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- Extension Reader classes

# Extension Reader classes

The following classes extend the base `BaseReader` functionality to handle reading and writing different table formats. Some, such as the `Basic` Reader class are fairly general and include a number of configurable attributes. Others such as `Cds` or `Daophot` are specialized to read certain well-defined but idiosyncratic formats.

- `AASTex`: AASTeX deluxetable used for AAS journals
- `Basic`: basic table with customizable delimiters and header configurations
- `Cds`: CDS format table (also Vizier and ApJ machine readable tables)
- `CommentedHeader`: column names given in a line that begins with the comment character
- `Daophot`: table from the IRAF DAOphot package
- `FixedWidth`: table with fixed-width columns (see also Fixed-width Gallery)
- `FixedWidthNoHeader`: table with fixed-width columns and no header
- `FixedWidthTwoLine`: table with fixed-width columns and a two-line header
- `HTML`: HTML format table contained in a <table> tag
- `Ipac`: IPAC format table
- `Latex`: LaTeX table with datavalue in the `tabular` environment
- `NoHeader`: basic table with no header where columns are auto-named
- `Rdb`: tab-separated values with an extra line after the column definition line
- `SExtractor`: SExtractor format table
- `Tab`: tab-separated values
- `Csv`: comma-separated values