# Source code for pystac.rel_type

    from pystac.utils import StringEnum

    class RelType(StringEnum):
        """A list of common rel types that can be used in STAC Link metadata.
        See :stac-spec:`"Using Relation Types <best-practices.md#using-relation-types>`
        in the STAC Best Practices for guidelines on using relation types. You may also want
        to refer to the "Relation type" documentation for
        :stac-spec:`Catalogs <catalog-spec/catalog-spec.md#relation-types>`,
        :stac-spec:`Collections <collection-spec/collection-spec.md#relation-types>`,
        or :stac-spec:`Items <item-spec/item-spec.md#relation-types>` for relation types
        specific to those STAC objects.
        """

        ALTERNATE = "alternate"
        CANONICAL = "canonical"
        CHILD = "child"
        COLLECTION = "collection"
        ITEM = "item"
        ITEMS = "items"
        LICENSE = "license"
        DERIVED_FROM = "derived_from"
        NEXT = "next"
        PARENT = "parent"
        PREV = "prev"
        PREVIEW = "preview"
        ROOT = "root"
        SELF = "self"
        VIA = "via"