# Source code for rdflib.plugins.sparql.parser

    """
    SPARQL 1.1 Parser

    based on pyparsing
    """

    import sys
    import re

    from pyparsing import (
        Literal, Regex, Optional, OneOrMore, ZeroOrMore, Forward,
        ParseException, Suppress, Combine, restOfLine, Group,
        ParseResults, delimitedList)
    from pyparsing import CaselessKeyword as Keyword  # watch out :)
    # from pyparsing import Keyword as CaseSensitiveKeyword

    from parserutils import Comp, Param, ParamList

    from . import operators as op
    from rdflib.py3compat import decodeUnicodeEscape, bytestype

    import rdflib

    DEBUG = False

    # ---------------- ACTIONS

    def neg(literal):
        return rdflib.Literal(-literal, datatype=literal.datatype)

    def setLanguage(terms):
        return rdflib.Literal(terms[0], lang=terms[1])

    def setDataType(terms):
        return rdflib.Literal(terms[0], datatype=terms[1])

    def expandTriples(terms):

        """
        Expand ; and , syntax for repeat predicates, subjects
        """
        # import pdb; pdb.set_trace()
        try:
            res = []
            if DEBUG:
                print "Terms", terms
            l = len(terms)
            for i, t in enumerate(terms):
                if t == ',':
                    res.append(res[i - 3])
                    res.append(res[i - 2])
                elif t == ';':
                    res.append(res[i - 3])
                elif isinstance(t, list):
                    # BlankNodePropertyList
                    # is this bnode the object of previous triples?
                    if (i % 3) == 2:
                        res.append(t[0])
                    # is this a single [] ?
                    if len(t) > 1:
                        res += t
                    # is this bnode the subject of more triples?
                    if i + 1 < l and terms[i + 1] not in ".,;" :
                        res.append(t[0])
                elif isinstance(t, ParseResults):
                    res += t.asList()
                elif t != '.':
                    res.append(t)

            return res
            # print res
            # assert len(res)%3 == 0, \
            #       "Length of triple-list is not divisible by 3: %d!"%len(res)

            # return [tuple(res[i:i+3]) for i in range(len(res)/3)]
        except:
            if DEBUG:
                import traceback
                traceback.print_exc()
            raise

    def expandBNodeTriples(terms):
        """
        expand [ ?p ?o ] syntax for implicit bnodes
        """
        # import pdb; pdb.set_trace()
        try:
            if DEBUG:
                print "Bnode terms", terms
                print "1", terms[0]
                print "2", [rdflib.BNode()] + terms.asList()[0]
            return [expandTriples([rdflib.BNode()] + terms.asList()[0])]
        except Exception, e:
            if DEBUG:
                print ">>>>>>>>", e
            raise

    def expandCollection(terms):
        """
        expand ( 1 2 3 ) notation for collections
        """
        if DEBUG:
            print "Collection: ", terms

        res = []
        other = []
        for x in terms:
            if isinstance(x, list):  # is this a [ .. ] ?
                other += x
                x = x[0]

            b = rdflib.BNode()
            if res:
                res += [res[-3], rdflib.RDF.rest, b, b, rdflib.RDF.first, x]
            else:
                res += [b, rdflib.RDF.first, x]
        res += [b, rdflib.RDF.rest, rdflib.RDF.nil]

        res += other

        if DEBUG:
            print "CollectionOut", res
        return [res]

    # SPARQL Grammar from http://www.w3.org/TR/sparql11-query/#grammar
    # ------ TERMINALS --------------
    # [139] IRIREF ::= '<' ([^<>"{}|^`\]-[#x00-#x20])* '>'
    IRIREF = Combine(Suppress('<') + Regex(r'[^<>"{}|^`\\%s]*' % ''.join(
        '\\x%02X' % i for i in range(33))) + Suppress('>'))
    IRIREF.setParseAction(lambda x: rdflib.URIRef(x[0]))

    # [164] P_CHARS_BASE ::= [A-Z] | [a-z] | [#x00C0-#x00D6] | [#x00D8-#x00F6] | [#x00F8-#x02FF] | [#x0370-#x037D] | [#x037F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]

    if sys.maxunicode == 0xffff:
        # this is narrow python build (default on windows/osx)
        # this means that unicode code points over 0xffff are stored
        # as several characters, which in turn means that regex character
        # ranges with these characters do not work.
        # See
        # * http://bugs.python.org/issue12729
        # * http://bugs.python.org/issue12749
        # * http://bugs.python.org/issue3665
        #
        # Here we simple skip the [#x10000-#xEFFFF] part
        # this means that some SPARQL queries will not parse :(
        # We *could* generate a new regex with \U00010000|\U00010001 ...
        # but it would be quite long :)
        #
        # in py3.3 this is fixed

        PN_CHARS_BASE_re = u'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD'
    else:
        # wide python build
        PN_CHARS_BASE_re = u'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD\U00010000-\U000EFFFF'

    # [165] PN_CHARS_U ::= PN_CHARS_BASE | '_'
    PN_CHARS_U_re = '_' + PN_CHARS_BASE_re

    # [167] PN_CHARS ::= PN_CHARS_U | '-' | [0-9] | #x00B7 | [#x0300-#x036F] | [#x203F-#x2040]
    PN_CHARS_re = u'\\-0-9\u00B7\u0300-\u036F\u203F-\u2040' + PN_CHARS_U_re
    # PN_CHARS = Regex(u'[%s]'%PN_CHARS_re, flags=re.U)

    # [168] PN_PREFIX ::= PN_CHARS_BASE ((PN_CHARS|'.')* PN_CHARS)?
    PN_PREFIX = Regex(ur'[%s](?:[%s\.]*[%s])?' % (PN_CHARS_BASE_re,
                      PN_CHARS_re, PN_CHARS_re), flags=re.U)

    # [140] PNAME_NS ::= PN_PREFIX? ':'
    PNAME_NS = Optional(
        Param('prefix', PN_PREFIX)) + Suppress(':').leaveWhitespace()

    # [173] PN_LOCAL_ESC ::= '\' ( '_' | '~' | '.' | '-' | '!' | '$' | '&' | "'" | '(' | ')' | '*' | '+' | ',' | ';' | '=' | '/' | '?' | '#' | '@' | '%' )

    PN_LOCAL_ESC_re = '\\\\[_~\\.\\-!$&"\'()*+,;=/?#@%]'
    #PN_LOCAL_ESC = Regex(PN_LOCAL_ESC_re) # regex'd
    #PN_LOCAL_ESC.setParseAction(lambda x: x[0][1:])

    # [172] HEX ::= [0-9] | [A-F] | [a-f]
    # HEX = Regex('[0-9A-Fa-f]') # not needed

    # [171] PERCENT ::= '%' HEX HEX
    PERCENT_re = '%[0-9a-fA-F]{2}'
    #PERCENT = Regex(PERCENT_re) # regex'd
    #PERCENT.setParseAction(lambda x: unichr(int(x[0][1:], 16)))

    # [170] PLX ::= PERCENT | PN_LOCAL_ESC
    PLX_re = '(%s|%s)'%(PN_LOCAL_ESC_re,PERCENT_re)
    #PLX = PERCENT | PN_LOCAL_ESC # regex'd

    # [169] PN_LOCAL ::= (PN_CHARS_U | ':' | [0-9] | PLX ) ((PN_CHARS | '.' | ':' | PLX)* (PN_CHARS | ':' | PLX) )?

    PN_LOCAL = Regex(ur"""([%(PN_CHARS_U)s:0-9]|%(PLX)s)
                         (([%(PN_CHARS)s\.:]|%(PLX)s)*
                          ([%(PN_CHARS)s:]|%(PLX)s) )?"""%dict(PN_CHARS_U=PN_CHARS_U_re,
                                                           PN_CHARS=PN_CHARS_re,
                                                             PLX=PLX_re), flags=re.X|re.UNICODE)

    def _hexExpand(match):
        return unichr(int(match.group(0)[1:], 16))

    PN_LOCAL.setParseAction(lambda x: re.sub("(%s)"%PERCENT_re, _hexExpand, x[0]))

    # [141] PNAME_LN ::= PNAME_NS PN_LOCAL
    PNAME_LN = PNAME_NS + Param('localname', PN_LOCAL.leaveWhitespace())

    # [142] BLANK_NODE_LABEL ::= '_:' ( PN_CHARS_U | [0-9] ) ((PN_CHARS|'.')* PN_CHARS)?
    BLANK_NODE_LABEL = Regex(ur'_:[0-9%s](?:[\.%s]*[%s])?' % (
        PN_CHARS_U_re, PN_CHARS_re, PN_CHARS_re), flags=re.U)
    BLANK_NODE_LABEL.setParseAction(lambda x: rdflib.BNode(x[0]))

    # [166] VARNAME ::= ( PN_CHARS_U | [0-9] ) ( PN_CHARS_U | [0-9] | #x00B7 | [#x0300-#x036F] | [#x203F-#x2040] )*
    VARNAME = Regex(u'[%s0-9][%s0-9\u00B7\u0300-\u036F\u203F-\u2040]*' % (
        PN_CHARS_U_re, PN_CHARS_U_re), flags=re.U)

    # [143] VAR1 ::= '?' VARNAME
    VAR1 = Combine(Suppress('?') + VARNAME)

    # [144] VAR2 ::= '$' VARNAME
    VAR2 = Combine(Suppress('$') + VARNAME)

    # [145] LANGTAG ::= '@' [a-zA-Z]+ ('-' [a-zA-Z0-9]+)*
    LANGTAG = Combine(Suppress('@') + Regex('[a-zA-Z]+(?:-[a-zA-Z0-9]+)*'))

    # [146] INTEGER ::= [0-9]+
    INTEGER = Regex(r"[0-9]+")
    # INTEGER.setResultsName('integer')
    INTEGER.setParseAction(
        lambda x: rdflib.Literal(x[0], datatype=rdflib.XSD.integer))

    # [155] EXPONENT ::= [eE] [+-]? [0-9]+
    EXPONENT_re = '[eE][+-]?[0-9]+'

    # [147] DECIMAL ::= [0-9]* '.' [0-9]+
    DECIMAL = Regex(r'[0-9]*\.[0-9]+')  # (?![eE])
    # DECIMAL.setResultsName('decimal')
    DECIMAL.setParseAction(
        lambda x: rdflib.Literal(x[0], datatype=rdflib.XSD.decimal))

    # [148] DOUBLE ::= [0-9]+ '.' [0-9]* EXPONENT | '.' ([0-9])+ EXPONENT | ([0-9])+ EXPONENT
    DOUBLE = Regex(
        r'[0-9]+\.[0-9]*%(e)s|\.([0-9])+%(e)s|[0-9]+%(e)s' % {'e': EXPONENT_re})
    # DOUBLE.setResultsName('double')
    DOUBLE.setParseAction(
        lambda x: rdflib.Literal(x[0], datatype=rdflib.XSD.double))

    # [149] INTEGER_POSITIVE ::= '+' INTEGER
    INTEGER_POSITIVE = Suppress('+') + INTEGER.copy().leaveWhitespace()
    INTEGER_POSITIVE.setParseAction(lambda x: rdflib.Literal(
        "+"+x[0], datatype=rdflib.XSD.integer))

    # [150] DECIMAL_POSITIVE ::= '+' DECIMAL
    DECIMAL_POSITIVE = Suppress('+') + DECIMAL.copy().leaveWhitespace()

    # [151] DOUBLE_POSITIVE ::= '+' DOUBLE
    DOUBLE_POSITIVE = Suppress('+') + DOUBLE.copy().leaveWhitespace()

    # [152] INTEGER_NEGATIVE ::= '-' INTEGER
    INTEGER_NEGATIVE = Suppress('-') + INTEGER.copy().leaveWhitespace()
    INTEGER_NEGATIVE.setParseAction(lambda x: neg(x[0]))

    # [153] DECIMAL_NEGATIVE ::= '-' DECIMAL
    DECIMAL_NEGATIVE = Suppress('-') + DECIMAL.copy().leaveWhitespace()
    DECIMAL_NEGATIVE.setParseAction(lambda x: neg(x[0]))

    # [154] DOUBLE_NEGATIVE ::= '-' DOUBLE
    DOUBLE_NEGATIVE = Suppress('-') + DOUBLE.copy().leaveWhitespace()
    DOUBLE_NEGATIVE.setParseAction(lambda x: neg(x[0]))

    # [160] ECHAR ::= '\' [tbnrf\"']
    # ECHAR = Regex('\\\\[tbnrf"\']')

    # [158] STRING_LITERAL_LONG1 ::= "'''" ( ( "'" | "''" )? ( [^'\] | ECHAR ) )* "'''"
    # STRING_LITERAL_LONG1 = Literal("'''") + ( Optional( Literal("'") | "''"
    # ) + ZeroOrMore( ~ Literal("'\\") | ECHAR ) ) + "'''"
    STRING_LITERAL_LONG1 = Regex(ur"'''((?:'|'')?(?:[^'\\]|\\['ntbrf\\]))*'''")
    STRING_LITERAL_LONG1.setParseAction(
        lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][3:-3])))

    # [159] STRING_LITERAL_LONG2 ::= '"""' ( ( '"' | '""' )? ( [^"\] | ECHAR ) )* '"""'
    # STRING_LITERAL_LONG2 = Literal('"""') + ( Optional( Literal('"') | '""'
    # ) + ZeroOrMore( ~ Literal('"\\') | ECHAR ) ) +  '"""'
    STRING_LITERAL_LONG2 = Regex(ur'"""(?:(?:"|"")?(?:[^"\\]|\\["ntbrf\\]))*"""')
    STRING_LITERAL_LONG2.setParseAction(
        lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][3:-3])))

    # [156] STRING_LITERAL1 ::= "'" ( ([^#x27#x5C#xA#xD]) | ECHAR )* "'"
    # STRING_LITERAL1 = Literal("'") + ZeroOrMore(
    # Regex(u'[^\u0027\u005C\u000A\u000D]',flags=re.U) | ECHAR ) + "'"

    STRING_LITERAL1 = Regex(
        ur"'(?:[^'\n\r\\]|\\['ntbrf\\])*'(?!')", flags=re.U)
    STRING_LITERAL1.setParseAction(
        lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][1:-1])))

    # [157] STRING_LITERAL2 ::= '"' ( ([^#x22#x5C#xA#xD]) | ECHAR )* '"'
    # STRING_LITERAL2 = Literal('"') + ZeroOrMore (
    # Regex(u'[^\u0022\u005C\u000A\u000D]',flags=re.U) | ECHAR ) + '"'

    STRING_LITERAL2 = Regex(
        ur'"(?:[^"\n\r\\]|\\["ntbrf\\])*"(?!")', flags=re.U)
    STRING_LITERAL2.setParseAction(
        lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][1:-1])))

    # [161] NIL ::= '(' WS* ')'
    NIL = Literal('(') + ')'
    NIL.setParseAction(lambda x: rdflib.RDF.nil)

    # [162] WS ::= #x20 | #x9 | #xD | #xA
    # Not needed?
    # WS = #x20 | #x9 | #xD | #xA
    # [163] ANON ::= '[' WS* ']'
    ANON = Literal('[') + ']'
    ANON.setParseAction(lambda x: rdflib.BNode())

    # A = CaseSensitiveKeyword('a')
    A = Literal('a')
    A.setParseAction(lambda x: rdflib.RDF.type)

    # ------ NON-TERMINALS --------------

    # [5] BaseDecl ::= 'BASE' IRIREF
    BaseDecl = Comp('Base', Keyword('BASE') + Param('iri', IRIREF))

    # [6] PrefixDecl ::= 'PREFIX' PNAME_NS IRIREF
    PrefixDecl = Comp(
        'PrefixDecl', Keyword('PREFIX') + PNAME_NS + Param('iri', IRIREF))

    # [4] Prologue ::= ( BaseDecl | PrefixDecl )*
    Prologue = Group(ZeroOrMore(BaseDecl | PrefixDecl))

    # [108] Var ::= VAR1 | VAR2
    Var = VAR1 | VAR2
    Var.setParseAction(lambda x: rdflib.term.Variable(x[0]))

    # [137] PrefixedName ::= PNAME_LN | PNAME_NS
    PrefixedName = Comp('pname', PNAME_LN | PNAME_NS)

    # [136] iri ::= IRIREF | PrefixedName
    iri = IRIREF | PrefixedName

    # [135] String ::= STRING_LITERAL1 | STRING_LITERAL2 | STRING_LITERAL_LONG1 | STRING_LITERAL_LONG2
    String = STRING_LITERAL_LONG1 | STRING_LITERAL_LONG2 | STRING_LITERAL1 | STRING_LITERAL2

    # [129] RDFLiteral ::= String ( LANGTAG | ( '^^' iri ) )?

    RDFLiteral = Comp('literal', Param('string', String) + Optional(Param(
        'lang', LANGTAG.leaveWhitespace()) | Literal('^^').leaveWhitespace() + Param('datatype', iri).leaveWhitespace()))

    # [132] NumericLiteralPositive ::= INTEGER_POSITIVE | DECIMAL_POSITIVE | DOUBLE_POSITIVE
    NumericLiteralPositive = DOUBLE_POSITIVE | DECIMAL_POSITIVE | INTEGER_POSITIVE

    # [133] NumericLiteralNegative ::= INTEGER_NEGATIVE | DECIMAL_NEGATIVE | DOUBLE_NEGATIVE
    NumericLiteralNegative = DOUBLE_NEGATIVE | DECIMAL_NEGATIVE | INTEGER_NEGATIVE

    # [131] NumericLiteralUnsigned ::= INTEGER | DECIMAL | DOUBLE
    NumericLiteralUnsigned = DOUBLE | DECIMAL | INTEGER

    # [130] NumericLiteral ::= NumericLiteralUnsigned | NumericLiteralPositive | NumericLiteralNegative
    NumericLiteral = NumericLiteralUnsigned | NumericLiteralPositive | NumericLiteralNegative

    # [134] BooleanLiteral ::= 'true' | 'false'
    BooleanLiteral = Keyword('true').setParseAction(lambda: rdflib.Literal(True)) |\
        Keyword('false').setParseAction(lambda: rdflib.Literal(False))

    # [138] BlankNode ::= BLANK_NODE_LABEL | ANON
    BlankNode = BLANK_NODE_LABEL | ANON

    # [109] GraphTerm ::= iri | RDFLiteral | NumericLiteral | BooleanLiteral | BlankNode | NIL
    GraphTerm = iri | RDFLiteral | NumericLiteral | BooleanLiteral | BlankNode | NIL

    # [106] VarOrTerm ::= Var | GraphTerm
    VarOrTerm = Var | GraphTerm

    # [107] VarOrIri ::= Var | iri
    VarOrIri = Var | iri

    # [46] GraphRef ::= 'GRAPH' iri
    GraphRef = Keyword('GRAPH') + Param('graphiri', iri)

    # [47] GraphRefAll ::= GraphRef | 'DEFAULT' | 'NAMED' | 'ALL'
    GraphRefAll = GraphRef | Param('graphiri', Keyword('DEFAULT')) | Param(
        'graphiri', Keyword('NAMED')) | Param('graphiri', Keyword('ALL'))

    # [45] GraphOrDefault ::= 'DEFAULT' | 'GRAPH'? iri
    GraphOrDefault = ParamList('graph', Keyword(
        'DEFAULT')) | Optional(Keyword('GRAPH')) + ParamList('graph', iri)

    # [65] DataBlockValue ::= iri | RDFLiteral | NumericLiteral | BooleanLiteral | 'UNDEF'
    DataBlockValue = iri | RDFLiteral | NumericLiteral | BooleanLiteral | Keyword(
        'UNDEF')

    # [78] Verb ::= VarOrIri | A
    Verb = VarOrIri | A

    # [85] VerbSimple ::= Var
    VerbSimple = Var

    # [97] Integer ::= INTEGER
    Integer = INTEGER

    TriplesNode = Forward()
    TriplesNodePath = Forward()

    # [104] GraphNode ::= VarOrTerm | TriplesNode
    GraphNode = VarOrTerm | TriplesNode

    # [105] GraphNodePath ::= VarOrTerm | TriplesNodePath
    GraphNodePath = VarOrTerm | TriplesNodePath

    # [93] PathMod ::= '?' | '*' | '+'
    PathMod = Literal('?') | '*' | '+'

    # [96] PathOneInPropertySet ::= iri | A | '^' ( iri | A )
    PathOneInPropertySet = iri | A | Comp('InversePath', '^' + (iri | A))

    Path = Forward()

    # [95] PathNegatedPropertySet ::= PathOneInPropertySet | '(' ( PathOneInPropertySet ( '|' PathOneInPropertySet )* )? ')'
    PathNegatedPropertySet = Comp('PathNegatedPropertySet', ParamList('part', PathOneInPropertySet) | '(' + Optional(
        ParamList('part', PathOneInPropertySet) + ZeroOrMore('|' + ParamList('part', PathOneInPropertySet))) + ')')

    # [94] PathPrimary ::= iri | A | '!' PathNegatedPropertySet | '(' Path ')' | 'DISTINCT' '(' Path ')'
    PathPrimary = iri | A | Suppress('!') + PathNegatedPropertySet | Suppress('(') + Path + Suppress(
        ')') | Comp('DistinctPath', Keyword('DISTINCT') + '(' + Param('part', Path) + ')')

    # [91] PathElt ::= PathPrimary Optional(PathMod)
    PathElt = Comp('PathElt', Param(
        'part', PathPrimary) + Optional(Param('mod', PathMod.leaveWhitespace())))

    # [92] PathEltOrInverse ::= PathElt | '^' PathElt
    PathEltOrInverse = PathElt | Suppress(
        '^') + Comp('PathEltOrInverse', Param('part', PathElt))

    # [90] PathSequence ::= PathEltOrInverse ( '/' PathEltOrInverse )*
    PathSequence = Comp('PathSequence', ParamList('part', PathEltOrInverse) +
                        ZeroOrMore('/' + ParamList('part', PathEltOrInverse)))

    # [89] PathAlternative ::= PathSequence ( '|' PathSequence )*
    PathAlternative = Comp('PathAlternative', ParamList('part', PathSequence) +
                           ZeroOrMore('|' + ParamList('part', PathSequence)))

    # [88] Path ::= PathAlternative
    Path << PathAlternative

    # [84] VerbPath ::= Path
    VerbPath = Path

    # [87] ObjectPath ::= GraphNodePath
    ObjectPath = GraphNodePath

    # [86] ObjectListPath ::= ObjectPath ( ',' ObjectPath )*
    ObjectListPath = ObjectPath + ZeroOrMore(',' + ObjectPath)

    GroupGraphPattern = Forward()

    # [102] Collection ::= '(' OneOrMore(GraphNode) ')'
    Collection = Suppress('(') + OneOrMore(GraphNode) + Suppress(')')
    Collection.setParseAction(expandCollection)

    # [103] CollectionPath ::= '(' OneOrMore(GraphNodePath) ')'
    CollectionPath = Suppress('(') + OneOrMore(GraphNodePath) + Suppress(')')
    CollectionPath.setParseAction(expandCollection)

    # [80] Object ::= GraphNode
    Object = GraphNode

    # [79] ObjectList ::= Object ( ',' Object )*
    ObjectList = Object + ZeroOrMore(',' + Object)

    # [83] PropertyListPathNotEmpty ::= ( VerbPath | VerbSimple ) ObjectListPath ( ';' ( ( VerbPath | VerbSimple ) ObjectList )? )*
    PropertyListPathNotEmpty = (VerbPath | VerbSimple) + ObjectListPath + ZeroOrMore(
        ';' + Optional((VerbPath | VerbSimple) + ObjectList))

    # [82] PropertyListPath ::= Optional(PropertyListPathNotEmpty)
    PropertyListPath = Optional(PropertyListPathNotEmpty)

    # [77] PropertyListNotEmpty ::= Verb ObjectList ( ';' ( Verb ObjectList )? )*
    PropertyListNotEmpty = Verb + ObjectList + ZeroOrMore(';' + Optional(Verb +
                                                          ObjectList))

    # [76] PropertyList ::= Optional(PropertyListNotEmpty)
    PropertyList = Optional(PropertyListNotEmpty)

    # [99] BlankNodePropertyList ::= '[' PropertyListNotEmpty ']'
    BlankNodePropertyList = Group(
        Suppress('[') + PropertyListNotEmpty + Suppress(']'))
    BlankNodePropertyList.setParseAction(expandBNodeTriples)

    # [101] BlankNodePropertyListPath ::= '[' PropertyListPathNotEmpty ']'
    BlankNodePropertyListPath = Group(
        Suppress('[') + PropertyListPathNotEmpty + Suppress(']'))
    BlankNodePropertyListPath.setParseAction(expandBNodeTriples)

    # [98] TriplesNode ::= Collection | BlankNodePropertyList
    TriplesNode << (Collection | BlankNodePropertyList)

    # [100] TriplesNodePath ::= CollectionPath | BlankNodePropertyListPath
    TriplesNodePath << (CollectionPath | BlankNodePropertyListPath)

    # [75] TriplesSameSubject ::= VarOrTerm PropertyListNotEmpty | TriplesNode PropertyList
    TriplesSameSubject = VarOrTerm + PropertyListNotEmpty | TriplesNode + \
        PropertyList
    TriplesSameSubject.setParseAction(expandTriples)

    # [52] TriplesTemplate ::= TriplesSameSubject ( '.' Optional(TriplesTemplate) )?
    TriplesTemplate = Forward()
    TriplesTemplate << (ParamList('triples', TriplesSameSubject) + Optional(
        Suppress('.') + Optional(TriplesTemplate)))

    # [51] QuadsNotTriples ::= 'GRAPH' VarOrIri '{' Optional(TriplesTemplate) '}'
    QuadsNotTriples = Comp('QuadsNotTriples', Keyword('GRAPH') + Param(
        'term', VarOrIri) + '{' + Optional(TriplesTemplate) + '}')

    # [50] Quads ::= Optional(TriplesTemplate) ( QuadsNotTriples '.'? Optional(TriplesTemplate) )*
    Quads = Comp('Quads', Optional(TriplesTemplate) + ZeroOrMore(ParamList(
        'quadsNotTriples', QuadsNotTriples) + Optional(Suppress('.')) + Optional(TriplesTemplate)))

    # [48] QuadPattern ::= '{' Quads '}'
    QuadPattern = '{' + Param('quads', Quads) + '}'

    # [49] QuadData ::= '{' Quads '}'
    QuadData = '{' + Param('quads', Quads) + '}'

    # [81] TriplesSameSubjectPath ::= VarOrTerm PropertyListPathNotEmpty | TriplesNodePath PropertyListPath
    TriplesSameSubjectPath = VarOrTerm + \
        PropertyListPathNotEmpty | TriplesNodePath + PropertyListPath
    TriplesSameSubjectPath.setParseAction(expandTriples)

    # [55] TriplesBlock ::= TriplesSameSubjectPath ( '.' Optional(TriplesBlock) )?
    TriplesBlock = Forward()
    TriplesBlock << (ParamList('triples', TriplesSameSubjectPath) + Optional(
        Suppress('.') + Optional(TriplesBlock)))

    # [66] MinusGraphPattern ::= 'MINUS' GroupGraphPattern
    MinusGraphPattern = Comp(
        'MinusGraphPattern', Keyword('MINUS') + Param('graph', GroupGraphPattern))

    # [67] GroupOrUnionGraphPattern ::= GroupGraphPattern ( 'UNION' GroupGraphPattern )*
    GroupOrUnionGraphPattern = Comp('GroupOrUnionGraphPattern', ParamList(
        'graph', GroupGraphPattern) + ZeroOrMore(Keyword('UNION') + ParamList('graph', GroupGraphPattern)))

    Expression = Forward()

    # [72] ExpressionList ::= NIL | '(' Expression ( ',' Expression )* ')'
    ExpressionList = NIL | Group(
        Suppress('(') + delimitedList(Expression) + Suppress(')'))

    # [122] RegexExpression ::= 'REGEX' '(' Expression ',' Expression ( ',' Expression )? ')'
    RegexExpression = Comp('Builtin_REGEX', Keyword('REGEX') + '(' + Param('text', Expression) + ',' + Param(
        'pattern', Expression) + Optional(',' + Param('flags', Expression)) + ')')
    RegexExpression.setEvalFn(op.Builtin_REGEX)

    # [123] SubstringExpression ::= 'SUBSTR' '(' Expression ',' Expression ( ',' Expression )? ')'
    SubstringExpression = Comp('Builtin_SUBSTR', Keyword('SUBSTR') + '(' + Param('arg', Expression) + ',' + Param(
        'start', Expression) + Optional(',' + Param('length', Expression)) + ')').setEvalFn(op.Builtin_SUBSTR)

    # [124] StrReplaceExpression ::= 'REPLACE' '(' Expression ',' Expression ',' Expression ( ',' Expression )? ')'
    StrReplaceExpression = Comp('Builtin_REPLACE', Keyword('REPLACE') + '(' + Param('arg', Expression) + ',' + Param(
        'pattern', Expression) + ',' + Param('replacement', Expression) + Optional(',' + Param('flags', Expression)) + ')').setEvalFn(op.Builtin_REPLACE)

    # [125] ExistsFunc ::= 'EXISTS' GroupGraphPattern
    ExistsFunc = Comp('Builtin_EXISTS', Keyword('EXISTS') + Param(
        'graph', GroupGraphPattern)).setEvalFn(op.Builtin_EXISTS)

    # [126] NotExistsFunc ::= 'NOT' 'EXISTS' GroupGraphPattern
    NotExistsFunc = Comp('Builtin_NOTEXISTS', Keyword('NOT') + Keyword(
        'EXISTS') + Param('graph', GroupGraphPattern)).setEvalFn(op.Builtin_EXISTS)

    # [127] Aggregate ::= 'COUNT' '(' 'DISTINCT'? ( '*' | Expression ) ')'
    # | 'SUM' '(' Optional('DISTINCT') Expression ')'
    # | 'MIN' '(' Optional('DISTINCT') Expression ')'
    # | 'MAX' '(' Optional('DISTINCT') Expression ')'
    # | 'AVG' '(' Optional('DISTINCT') Expression ')'
    # | 'SAMPLE' '(' Optional('DISTINCT') Expression ')'
    # | 'GROUP_CONCAT' '(' Optional('DISTINCT') Expression ( ';' 'SEPARATOR' '=' String )? ')'

    _Distinct = Optional(Keyword('DISTINCT'))
    _AggregateParams = '(' + Param(
        'distinct', _Distinct) + Param('vars', Expression) + ')'

    Aggregate = Comp('Aggregate_Count', Keyword('COUNT') + '(' + Param('distinct', _Distinct) + Param('vars', '*' | Expression) + ')')\
        | Comp('Aggregate_Sum', Keyword('SUM') + _AggregateParams)\
        | Comp('Aggregate_Min', Keyword('MIN') + _AggregateParams)\
        | Comp('Aggregate_Max', Keyword('MAX') + _AggregateParams)\
        | Comp('Aggregate_Avg', Keyword('AVG') + _AggregateParams)\
        | Comp('Aggregate_Sample', Keyword('SAMPLE') + _AggregateParams)\
        | Comp('Aggregate_GroupConcat', Keyword('GROUP_CONCAT') + '(' + Param('distinct', _Distinct) + Param('vars', Expression) + Optional(';' + Keyword('SEPARATOR') + '=' + Param('separator', String)) + ')')

    # [121] BuiltInCall ::= Aggregate
    # | 'STR' '(' + Expression + ')'
    # | 'LANG' '(' + Expression + ')'
    # | 'LANGMATCHES' '(' + Expression + ',' + Expression + ')'
    # | 'DATATYPE' '(' + Expression + ')'
    # | 'BOUND' '(' Var ')'
    # | 'IRI' '(' + Expression + ')'
    # | 'URI' '(' + Expression + ')'
    # | 'BNODE' ( '(' + Expression + ')' | NIL )
    # | 'RAND' NIL
    # | 'ABS' '(' + Expression + ')'
    # | 'CEIL' '(' + Expression + ')'
    # | 'FLOOR' '(' + Expression + ')'
    # | 'ROUND' '(' + Expression + ')'
    # | 'CONCAT' ExpressionList
    # | SubstringExpression
    # | 'STRLEN' '(' + Expression + ')'
    # | StrReplaceExpression
    # | 'UCASE' '(' + Expression + ')'
    # | 'LCASE' '(' + Expression + ')'
    # | 'ENCODE_FOR_URI' '(' + Expression + ')'
    # | 'CONTAINS' '(' + Expression + ',' + Expression + ')'
    # | 'STRSTARTS' '(' + Expression + ',' + Expression + ')'
    # | 'STRENDS' '(' + Expression + ',' + Expression + ')'
    # | 'STRBEFORE' '(' + Expression + ',' + Expression + ')'
    # | 'STRAFTER' '(' + Expression + ',' + Expression + ')'
    # | 'YEAR' '(' + Expression + ')'
    # | 'MONTH' '(' + Expression + ')'
    # | 'DAY' '(' + Expression + ')'
    # | 'HOURS' '(' + Expression + ')'
    # | 'MINUTES' '(' + Expression + ')'
    # | 'SECONDS' '(' + Expression + ')'
    # | 'TIMEZONE' '(' + Expression + ')'
    # | 'TZ' '(' + Expression + ')'
    # | 'NOW' NIL
    # | 'UUID' NIL
    # | 'STRUUID' NIL
    # | 'MD5' '(' + Expression + ')'
    # | 'SHA1' '(' + Expression + ')'
    # | 'SHA256' '(' + Expression + ')'
    # | 'SHA384' '(' + Expression + ')'
    # | 'SHA512' '(' + Expression + ')'
    # | 'COALESCE' ExpressionList
    # | 'IF' '(' Expression ',' Expression ',' Expression ')'
    # | 'STRLANG' '(' + Expression + ',' + Expression + ')'
    # | 'STRDT' '(' + Expression + ',' + Expression + ')'
    # | 'sameTerm' '(' + Expression + ',' + Expression + ')'
    # | 'isIRI' '(' + Expression + ')'
    # | 'isURI' '(' + Expression + ')'
    # | 'isBLANK' '(' + Expression + ')'
    # | 'isLITERAL' '(' + Expression + ')'
    # | 'isNUMERIC' '(' + Expression + ')'
    # | RegexExpression
    # | ExistsFunc
    # | NotExistsFunc

    BuiltInCall = Aggregate \
        | Comp('Builtin_STR', Keyword('STR') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_STR) \
        | Comp('Builtin_LANG', Keyword('LANG') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_LANG) \
        | Comp('Builtin_LANGMATCHES', Keyword('LANGMATCHES') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_LANGMATCHES) \
        | Comp('Builtin_DATATYPE', Keyword('DATATYPE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_DATATYPE) \
        | Comp('Builtin_BOUND', Keyword('BOUND') + '(' + Param('arg', Var) + ')').setEvalFn(op.Builtin_BOUND) \
        | Comp('Builtin_IRI', Keyword('IRI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_IRI) \
        | Comp('Builtin_URI', Keyword('URI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_IRI) \
        | Comp('Builtin_BNODE', Keyword('BNODE') + ('(' + Param('arg', Expression) + ')' | NIL)).setEvalFn(op.Builtin_BNODE) \
        | Comp('Builtin_RAND', Keyword('RAND') + NIL).setEvalFn(op.Builtin_RAND) \
        | Comp('Builtin_ABS', Keyword('ABS') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_ABS) \
        | Comp('Builtin_CEIL', Keyword('CEIL') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_CEIL) \
        | Comp('Builtin_FLOOR', Keyword('FLOOR') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_FLOOR) \
        | Comp('Builtin_ROUND', Keyword('ROUND') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_ROUND) \
        | Comp('Builtin_CONCAT', Keyword('CONCAT') + Param('arg', ExpressionList)).setEvalFn(op.Builtin_CONCAT) \
        | SubstringExpression \
        | Comp('Builtin_STRLEN', Keyword('STRLEN') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_STRLEN) \
        | StrReplaceExpression \
        | Comp('Builtin_UCASE', Keyword('UCASE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_UCASE) \
        | Comp('Builtin_LCASE', Keyword('LCASE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_LCASE) \
        | Comp('Builtin_ENCODE_FOR_URI', Keyword('ENCODE_FOR_URI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_ENCODE_FOR_URI) \
        | Comp('Builtin_CONTAINS', Keyword('CONTAINS') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_CONTAINS) \
        | Comp('Builtin_STRSTARTS', Keyword('STRSTARTS') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRSTARTS) \
        | Comp('Builtin_STRENDS', Keyword('STRENDS') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRENDS) \
        | Comp('Builtin_STRBEFORE', Keyword('STRBEFORE') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRBEFORE) \
        | Comp('Builtin_STRAFTER', Keyword('STRAFTER') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRAFTER) \
        | Comp('Builtin_YEAR', Keyword('YEAR') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_YEAR) \
        | Comp('Builtin_MONTH', Keyword('MONTH') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_MONTH) \
        | Comp('Builtin_DAY', Keyword('DAY') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_DAY) \
        | Comp('Builtin_HOURS', Keyword('HOURS') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_HOURS) \
        | Comp('Builtin_MINUTES', Keyword('MINUTES') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_MINUTES) \
        | Comp('Builtin_SECONDS', Keyword('SECONDS') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SECONDS) \
        | Comp('Builtin_TIMEZONE', Keyword('TIMEZONE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_TIMEZONE) \
        | Comp('Builtin_TZ', Keyword('TZ') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_TZ) \
        | Comp('Builtin_NOW', Keyword('NOW') + NIL).setEvalFn(op.Builtin_NOW) \
        | Comp('Builtin_UUID', Keyword('UUID') + NIL).setEvalFn(op.Builtin_UUID) \
        | Comp('Builtin_STRUUID', Keyword('STRUUID') + NIL).setEvalFn(op.Builtin_STRUUID) \
        | Comp('Builtin_MD5', Keyword('MD5') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_MD5) \
        | Comp('Builtin_SHA1', Keyword('SHA1') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA1) \
        | Comp('Builtin_SHA256', Keyword('SHA256') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA256) \
        | Comp('Builtin_SHA384', Keyword('SHA384') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA384) \
        | Comp('Builtin_SHA512', Keyword('SHA512') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA512) \
        | Comp('Builtin_COALESCE', Keyword('COALESCE') + Param('arg', ExpressionList)).setEvalFn(op.Builtin_COALESCE) \
        | Comp('Builtin_IF', Keyword('IF') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ',' + Param('arg3', Expression) + ')').setEvalFn(op.Builtin_IF) \
        | Comp('Builtin_STRLANG', Keyword('STRLANG') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRLANG) \
        | Comp('Builtin_STRDT', Keyword('STRDT') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRDT) \
        | Comp('Builtin_sameTerm', Keyword('sameTerm') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_sameTerm) \
        | Comp('Builtin_isIRI', Keyword('isIRI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isIRI) \
        | Comp('Builtin_isURI', Keyword('isURI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isIRI) \
        | Comp('Builtin_isBLANK', Keyword('isBLANK') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isBLANK) \
        | Comp('Builtin_isLITERAL', Keyword('isLITERAL') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isLITERAL) \
        | Comp('Builtin_isNUMERIC', Keyword('isNUMERIC') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isNUMERIC) \
        | RegexExpression \
        | ExistsFunc \
        | NotExistsFunc

    # [71] ArgList ::= NIL | '(' 'DISTINCT'? Expression ( ',' Expression )* ')'
    ArgList = NIL | '(' + Param('distinct', _Distinct) + delimitedList(
        ParamList('expr', Expression)) + ')'

    # [128] iriOrFunction ::= iri Optional(ArgList)
    iriOrFunction = (Comp(
        'Function', Param('iri', iri) + ArgList).setEvalFn(op.Function)) | iri

    # [70] FunctionCall ::= iri ArgList
    FunctionCall = Comp(
        'Function', Param('iri', iri) + ArgList).setEvalFn(op.Function)

    # [120] BrackettedExpression ::= '(' Expression ')'
    BrackettedExpression = Suppress('(') + Expression + Suppress(')')

    # [119] PrimaryExpression ::= BrackettedExpression | BuiltInCall | iriOrFunction | RDFLiteral | NumericLiteral | BooleanLiteral | Var
    PrimaryExpression = BrackettedExpression | BuiltInCall | iriOrFunction | RDFLiteral | NumericLiteral | BooleanLiteral | Var

    # [118] UnaryExpression ::= '!' PrimaryExpression
    # | '+' PrimaryExpression
    # | '-' PrimaryExpression
    # | PrimaryExpression
    UnaryExpression = Comp('UnaryNot', '!' + Param('expr', PrimaryExpression)).setEvalFn(op.UnaryNot) \
        | Comp('UnaryPlus', '+' + Param('expr', PrimaryExpression)).setEvalFn(op.UnaryPlus) \
        | Comp('UnaryMinus', '-' + Param('expr', PrimaryExpression)).setEvalFn(op.UnaryMinus) \
        | PrimaryExpression

    # [117] MultiplicativeExpression ::= UnaryExpression ( '*' UnaryExpression | '/' UnaryExpression )*
    MultiplicativeExpression = Comp('MultiplicativeExpression', Param('expr', UnaryExpression) + ZeroOrMore(ParamList('op', '*') + ParamList(
        'other', UnaryExpression) | ParamList('op', '/') + ParamList('other', UnaryExpression))).setEvalFn(op.MultiplicativeExpression)

    # [116] AdditiveExpression ::= MultiplicativeExpression ( '+' MultiplicativeExpression | '-' MultiplicativeExpression | ( NumericLiteralPositive | NumericLiteralNegative ) ( ( '*' UnaryExpression ) | ( '/' UnaryExpression ) )* )*

    ### NOTE: The second part of this production is there because:
    ### "In signed numbers, no white space is allowed between the sign and the number. The AdditiveExpression grammar rule allows for this by covering the two cases of an expression followed by a signed number. These produce an addition or subtraction of the unsigned number as appropriate."

    # Here (I think) this is not nescessary since pyparsing doesn't separate
    # tokenizing and parsing

    AdditiveExpression = Comp('AdditiveExpression', Param('expr', MultiplicativeExpression) +
                              ZeroOrMore(ParamList('op', '+') + ParamList('other', MultiplicativeExpression) |
                                         ParamList('op', '-') + ParamList('other', MultiplicativeExpression))).setEvalFn(op.AdditiveExpression)

    # [115] NumericExpression ::= AdditiveExpression
    NumericExpression = AdditiveExpression

    # [114] RelationalExpression ::= NumericExpression ( '=' NumericExpression | '!=' NumericExpression | '<' NumericExpression | '>' NumericExpression | '<=' NumericExpression | '>=' NumericExpression | 'IN' ExpressionList | 'NOT' 'IN' ExpressionList )?
    RelationalExpression = Comp('RelationalExpression', Param('expr', NumericExpression) + Optional(
        Param('op', '=') + Param('other', NumericExpression) |
        Param('op', '!=') + Param('other', NumericExpression) |
        Param('op', '<') + Param('other', NumericExpression) |
        Param('op', '>') + Param('other', NumericExpression) |
        Param('op', '<=') + Param('other', NumericExpression) |
        Param('op', '>=') + Param('other', NumericExpression) |
        Param('op', Keyword('IN')) + Param('other', ExpressionList) |
        Param('op', Combine(Keyword('NOT') + Keyword('IN'), adjacent=False, joinString=" ")) + Param('other', ExpressionList))).setEvalFn(op.RelationalExpression)

    # [113] ValueLogical ::= RelationalExpression
    ValueLogical = RelationalExpression

    # [112] ConditionalAndExpression ::= ValueLogical ( '&&' ValueLogical )*
    ConditionalAndExpression = Comp('ConditionalAndExpression', Param('expr', ValueLogical) + ZeroOrMore(
        '&&' + ParamList('other', ValueLogical))).setEvalFn(op.ConditionalAndExpression)

    # [111] ConditionalOrExpression ::= ConditionalAndExpression ( '||' ConditionalAndExpression )*
    ConditionalOrExpression = Comp('ConditionalOrExpression', Param('expr', ConditionalAndExpression) + ZeroOrMore(
        '||' + ParamList('other', ConditionalAndExpression))).setEvalFn(op.ConditionalOrExpression)

    # [110] Expression ::= ConditionalOrExpression
    Expression << ConditionalOrExpression

    # [69] Constraint ::= BrackettedExpression | BuiltInCall | FunctionCall
    Constraint = BrackettedExpression | BuiltInCall | FunctionCall

    # [68] Filter ::= 'FILTER' Constraint
    Filter = Comp('Filter', Keyword('FILTER') + Param('expr', Constraint))

    # [16] SourceSelector ::= iri
    SourceSelector = iri

    # [14] DefaultGraphClause ::= SourceSelector
    DefaultGraphClause = SourceSelector

    # [15] NamedGraphClause ::= 'NAMED' SourceSelector
    NamedGraphClause = Keyword('NAMED') + Param('named', SourceSelector)

    # [13] DatasetClause ::= 'FROM' ( DefaultGraphClause | NamedGraphClause )
    DatasetClause = Comp('DatasetClause', Keyword(
        'FROM') + (Param('default', DefaultGraphClause) | NamedGraphClause))

    # [20] GroupCondition ::= BuiltInCall | FunctionCall | '(' Expression ( 'AS' Var )? ')' | Var
    GroupCondition = BuiltInCall | FunctionCall | Comp('GroupAs', '(' + Param(
        'expr', Expression) + Optional(Keyword('AS') + Param('var', Var)) + ')') | Var

    # [19] GroupClause ::= 'GROUP' 'BY' GroupCondition+
    GroupClause = Comp('GroupClause', Keyword('GROUP') + Keyword(
        'BY') + OneOrMore(ParamList('condition', GroupCondition)))

    _Silent = Optional(Param('silent', Keyword('SILENT')))

    # [31] Load ::= 'LOAD' 'SILENT'? iri ( 'INTO' GraphRef )?
    Load = Comp('Load', Keyword('LOAD') + _Silent + Param('iri', iri) +
                Optional(Keyword('INTO') + GraphRef))

    # [32] Clear ::= 'CLEAR' 'SILENT'? GraphRefAll
    Clear = Comp('Clear', Keyword('CLEAR') + _Silent + GraphRefAll)

    # [33] Drop ::= 'DROP' _Silent GraphRefAll
    Drop = Comp('Drop', Keyword('DROP') + _Silent + GraphRefAll)

    # [34] Create ::= 'CREATE' _Silent GraphRef
    Create = Comp('Create', Keyword('CREATE') + _Silent + GraphRef)

    # [35] Add ::= 'ADD' _Silent GraphOrDefault 'TO' GraphOrDefault
    Add = Comp('Add', Keyword(
        'ADD') + _Silent + GraphOrDefault + Keyword('TO') + GraphOrDefault)

    # [36] Move ::= 'MOVE' _Silent GraphOrDefault 'TO' GraphOrDefault
    Move = Comp('Move', Keyword(
        'MOVE') + _Silent + GraphOrDefault + Keyword('TO') + GraphOrDefault)

    # [37] Copy ::= 'COPY' _Silent GraphOrDefault 'TO' GraphOrDefault
    Copy = Comp('Copy', Keyword(
        'COPY') + _Silent + GraphOrDefault + Keyword('TO') + GraphOrDefault)

    # [38] InsertData ::= 'INSERT DATA' QuadData
    InsertData = Comp('InsertData', Keyword('INSERT') + Keyword('DATA') + QuadData)

    # [39] DeleteData ::= 'DELETE DATA' QuadData
    DeleteData = Comp('DeleteData', Keyword('DELETE') + Keyword('DATA') + QuadData)

    # [40] DeleteWhere ::= 'DELETE WHERE' QuadPattern
    DeleteWhere = Comp(
        'DeleteWhere', Keyword('DELETE') + Keyword('WHERE') + QuadPattern)

    # [42] DeleteClause ::= 'DELETE' QuadPattern
    DeleteClause = Comp('DeleteClause', Keyword('DELETE') + QuadPattern)

    # [43] InsertClause ::= 'INSERT' QuadPattern
    InsertClause = Comp('InsertClause', Keyword('INSERT') + QuadPattern)

    # [44] UsingClause ::= 'USING' ( iri | 'NAMED' iri )
    UsingClause = Comp('UsingClause', Keyword('USING') + (
        Param('default', iri) | Keyword('NAMED') + Param('named', iri)))

    # [41] Modify ::= ( 'WITH' iri )? ( DeleteClause Optional(InsertClause) | InsertClause ) ZeroOrMore(UsingClause) 'WHERE' GroupGraphPattern
    Modify = Comp('Modify', Optional(Keyword('WITH') + Param('withClause', iri)) + (Param('delete', DeleteClause) + Optional(Param(
        'insert', InsertClause)) | Param('insert', InsertClause)) + ZeroOrMore(ParamList('using', UsingClause)) + Keyword('WHERE') + Param('where', GroupGraphPattern))

    # [30] Update1 ::= Load | Clear | Drop | Add | Move | Copy | Create | InsertData | DeleteData | DeleteWhere | Modify
    Update1 = Load | Clear | Drop | Add | Move | Copy | Create | InsertData | DeleteData | DeleteWhere | Modify

    # [63] InlineDataOneVar ::= Var '{' ZeroOrMore(DataBlockValue) '}'
    InlineDataOneVar = ParamList(
        'var', Var) + '{' + ZeroOrMore(ParamList('value', DataBlockValue)) + '}'

    # [64] InlineDataFull ::= ( NIL | '(' ZeroOrMore(Var) ')' ) '{' ( '(' ZeroOrMore(DataBlockValue) ')' | NIL )* '}'
    InlineDataFull = (NIL | '(' + ZeroOrMore(ParamList('var', Var)) + ')') + '{' + ZeroOrMore(
        ParamList('value', Group(Suppress('(') + ZeroOrMore(DataBlockValue) + Suppress(')') | NIL))) + '}'

    # [62] DataBlock ::= InlineDataOneVar | InlineDataFull
    DataBlock = InlineDataOneVar | InlineDataFull

    # [28] ValuesClause ::= ( 'VALUES' DataBlock )?
    ValuesClause = Optional(Param(
        'valuesClause', Comp('ValuesClause', Keyword('VALUES') + DataBlock)))

    # [74] ConstructTriples ::= TriplesSameSubject ( '.' Optional(ConstructTriples) )?
    ConstructTriples = Forward()
    ConstructTriples << (ParamList('template', TriplesSameSubject) + Optional(
        Suppress('.') + Optional(ConstructTriples)))

    # [73] ConstructTemplate ::= '{' Optional(ConstructTriples) '}'
    ConstructTemplate = Suppress('{') + Optional(ConstructTriples) + Suppress('}')

    # [57] OptionalGraphPattern ::= 'OPTIONAL' GroupGraphPattern
    OptionalGraphPattern = Comp('OptionalGraphPattern', Keyword(
        'OPTIONAL') + Param('graph', GroupGraphPattern))

    # [58] GraphGraphPattern ::= 'GRAPH' VarOrIri GroupGraphPattern
    GraphGraphPattern = Comp('GraphGraphPattern', Keyword(
        'GRAPH') + Param('term', VarOrIri) + Param('graph', GroupGraphPattern))

    # [59] ServiceGraphPattern ::= 'SERVICE' _Silent VarOrIri GroupGraphPattern
    ServiceGraphPattern = Comp('ServiceGraphPattern', Keyword(
        'SERVICE') + _Silent + Param('term', VarOrIri) + Param('graph', GroupGraphPattern))

    # [60] Bind ::= 'BIND' '(' Expression 'AS' Var ')'
    Bind = Comp('Bind', Keyword('BIND') + '(' + Param(
        'expr', Expression) + Keyword('AS') + Param('var', Var) + ')')

    # [61] InlineData ::= 'VALUES' DataBlock
    InlineData = Comp('InlineData', Keyword('VALUES') + DataBlock)

    # [56] GraphPatternNotTriples ::= GroupOrUnionGraphPattern | OptionalGraphPattern | MinusGraphPattern | GraphGraphPattern | ServiceGraphPattern | Filter | Bind | InlineData
    GraphPatternNotTriples = GroupOrUnionGraphPattern | OptionalGraphPattern | MinusGraphPattern | GraphGraphPattern | ServiceGraphPattern | Filter | Bind | InlineData

    # [54] GroupGraphPatternSub ::= Optional(TriplesBlock) ( GraphPatternNotTriples '.'? Optional(TriplesBlock) )*
    GroupGraphPatternSub = Comp('GroupGraphPatternSub', Optional(ParamList('part', Comp('TriplesBlock', TriplesBlock))) + ZeroOrMore(
        ParamList('part', GraphPatternNotTriples) + Optional('.') + Optional(ParamList('part', Comp('TriplesBlock', TriplesBlock)))))

    # ----------------
    # [22] HavingCondition ::= Constraint
    HavingCondition = Constraint

    # [21] HavingClause ::= 'HAVING' HavingCondition+
    HavingClause = Comp('HavingClause', Keyword(
        'HAVING') + OneOrMore(ParamList('condition', HavingCondition)))

    # [24] OrderCondition ::= ( ( 'ASC' | 'DESC' ) BrackettedExpression )
    # | ( Constraint | Var )
    OrderCondition = Comp('OrderCondition', Param('order', Keyword('ASC') | Keyword(
        'DESC')) + Param('expr', BrackettedExpression) | Param('expr', Constraint | Var))

    # [23] OrderClause ::= 'ORDER' 'BY' OneOrMore(OrderCondition)
    OrderClause = Comp('OrderClause', Keyword('ORDER') + Keyword(
        'BY') + OneOrMore(ParamList('condition', OrderCondition)))

    # [26] LimitClause ::= 'LIMIT' INTEGER
    LimitClause = Keyword('LIMIT') + Param('limit', INTEGER)

    # [27] OffsetClause ::= 'OFFSET' INTEGER
    OffsetClause = Keyword('OFFSET') + Param('offset', INTEGER)

    # [25] LimitOffsetClauses ::= LimitClause Optional(OffsetClause) | OffsetClause Optional(LimitClause)
    LimitOffsetClauses = Comp('LimitOffsetClauses', LimitClause + Optional(
        OffsetClause) | OffsetClause + Optional(LimitClause))

    # [18] SolutionModifier ::= GroupClause? HavingClause? OrderClause? LimitOffsetClauses?
    SolutionModifier = Optional(Param('groupby', GroupClause)) + Optional(Param('having', HavingClause)) + Optional(
        Param('orderby', OrderClause)) + Optional(Param('limitoffset', LimitOffsetClauses))

    # [9] SelectClause ::= 'SELECT' ( 'DISTINCT' | 'REDUCED' )? ( ( Var | ( '(' Expression 'AS' Var ')' ) )+ | '*' )
    SelectClause = Keyword('SELECT') + Optional(Param('modifier', Keyword('DISTINCT') | Keyword('REDUCED'))) + (OneOrMore(ParamList('projection', Comp('vars',
        Param('var', Var) | (Literal('(') + Param('expr', Expression) + Keyword('AS') + Param('evar', Var) + ')')))) | '*')

    # [17] WhereClause ::= 'WHERE'? GroupGraphPattern
    WhereClause = Optional(Keyword('WHERE')) + Param('where', GroupGraphPattern)

    # [8] SubSelect ::= SelectClause WhereClause SolutionModifier ValuesClause
    SubSelect = Comp('SubSelect', SelectClause + WhereClause +
                     SolutionModifier + ValuesClause)

    # [53] GroupGraphPattern ::= '{' ( SubSelect | GroupGraphPatternSub ) '}'
    GroupGraphPattern << (
        Suppress('{') + (SubSelect | GroupGraphPatternSub) + Suppress('}'))

    # [7] SelectQuery ::= SelectClause DatasetClause* WhereClause SolutionModifier
    SelectQuery = Comp('SelectQuery', SelectClause + ZeroOrMore(ParamList(
        'datasetClause', DatasetClause)) + WhereClause + SolutionModifier + ValuesClause)

    # [10] ConstructQuery ::= 'CONSTRUCT' ( ConstructTemplate DatasetClause* WhereClause SolutionModifier | DatasetClause* 'WHERE' '{' TriplesTemplate? '}' SolutionModifier )
    # NOTE: The CONSTRUCT WHERE alternative has unnescessarily many Comp/Param pairs
    # to allow it to through the same algebra translation process
    ConstructQuery = Comp('ConstructQuery', Keyword('CONSTRUCT') + (ConstructTemplate + ZeroOrMore(ParamList('datasetClause', DatasetClause)) + WhereClause + SolutionModifier + ValuesClause | ZeroOrMore(ParamList(
        'datasetClause', DatasetClause)) + Keyword('WHERE') + '{' + Optional(Param('where', Comp('FakeGroupGraphPatten', ParamList('part', Comp('TriplesBlock', TriplesTemplate))))) + '}' + SolutionModifier + ValuesClause))

    # [12] AskQuery ::= 'ASK' DatasetClause* WhereClause SolutionModifier
    AskQuery = Comp('AskQuery', Keyword('ASK') + Param('datasetClause', ZeroOrMore(
        DatasetClause)) + WhereClause + SolutionModifier + ValuesClause)

    # [11] DescribeQuery ::= 'DESCRIBE' ( VarOrIri+ | '*' ) DatasetClause* WhereClause? SolutionModifier
    DescribeQuery = Comp('DescribeQuery', Keyword('DESCRIBE') + (OneOrMore(ParamList('var', VarOrIri)) | '*') + Param(
        'datasetClause', ZeroOrMore(DatasetClause)) + Optional(WhereClause) + SolutionModifier + ValuesClause)

    # [29] Update ::= Prologue ( Update1 ( ';' Update )? )?
    Update = Forward()
    Update << (ParamList('prologue', Prologue) + Optional(ParamList('request',
               Update1) + Optional(';' + Update)))

    # [2] Query ::= Prologue
    # ( SelectQuery | ConstructQuery | DescribeQuery | AskQuery )
    # ValuesClause
    # NOTE: ValuesClause was moved to invidual queries
    Query = Prologue + (SelectQuery | ConstructQuery | DescribeQuery | AskQuery)

    # [3] UpdateUnit ::= Update
    UpdateUnit = Comp('Update', Update)

    # [1] QueryUnit ::= Query
    QueryUnit = Query

    QueryUnit.ignore('#' + restOfLine)
    UpdateUnit.ignore('#' + restOfLine)

    expandUnicodeEscapes_re = re.compile(
        r'\\u([0-9a-f]{4}(?:[0-9a-f]{4})?)', flags=re.I)

    def expandUnicodeEscapes(q):
        """
        The syntax of the SPARQL Query Language is expressed over code points in Unicode [UNICODE]. The encoding is always UTF-8 [RFC3629].
        Unicode code points may also be expressed using an \ uXXXX (U+0 to U+FFFF) or \ UXXXXXXXX syntax (for U+10000 onwards) where X is a hexadecimal digit [0-9A-F]
        """

        def expand(m):
            try:
                return unichr(int(m.group(1), 16))
            except:
                raise Exception("Invalid unicode code point: " + m)

        return expandUnicodeEscapes_re.sub(expand, q)

    def parseQuery(q):
        if hasattr(q, 'read'):
            q = q.read()
        if isinstance(q, bytestype):
            q = q.decode('utf-8')

        q = expandUnicodeEscapes(q)
        return Query.parseString(q, parseAll=True)

    def parseUpdate(q):
        if hasattr(q, 'read'):
            q = q.read()

        if isinstance(q, bytestype):
            q = q.decode('utf-8')

        q = expandUnicodeEscapes(q)
        return UpdateUnit.parseString(q, parseAll=True)[0]

    if __name__ == '__main__':
        import sys
        DEBUG = True
        try:
            q = Query.parseString(sys.argv[1])
            print "\nSyntax Tree:\n"
            print q
        except ParseException, err:
            print err.line
            print " " * (err.column - 1) + "^"
            print err