Text.XML.HaXml.Parse

A non-validating XML parser. For the input grammar, see http://www.w3.org/TR/REC-xml.

Parse a whole document

xmlParse :: String -> String -> Document Posn

To parse a whole document, xmlParse file content takes a filename (for generating error reports) and the string content of that file. A parse error causes program failure, with message to stderr.

xmlParse' :: String -> String -> Either String (Document Posn)

To parse a whole document, xmlParse' file content takes a filename (for generating error reports) and the string content of that file. Any parse error message is passed back to the caller through the Either type.

Parse just a DTD

dtdParse :: String -> String -> Maybe DocTypeDecl

To parse just a DTD, dtdParse file content takes a filename (for generating error reports) and the string content of that file. If no DTD was found, you get Nothing rather than an error. However, if a DTD is found but contains errors, the program crashes.

dtdParse' :: String -> String -> Either String (Maybe DocTypeDecl)

To parse just a DTD, dtdParse' file content takes a filename (for generating error reports) and the string content of that file. If no DTD was found, you get Right Nothing. If a DTD was found but contains errors, you get a Left message.

Parse a partial document

xmlParseWith :: XParser a -> [(Posn, TokenT)] -> (Either String a, [(Posn, TokenT)])

To parse a partial document, e.g. from an XML-based stream protocol, where you may later want to get more document elements from the same stream. Arguments are: a parser for the item you want, and the already-lexed input to parse from. Returns the item you wanted (or an error message), plus the remainder of the input.

Individual parsers for use with xmlParseWith and module SAX

document :: XParser (Document Posn)

Return an entire XML document including prolog and trailing junk.

element :: XParser (Element Posn)

Return a complete element including all its inner content.

content :: XParser (Content Posn)

Return a content particle, e.g. text, element, reference, etc

comment :: XParser Comment

Return an XML comment.

cdsect :: XParser CDSect

chardata :: XParser CharData

Return parsed freetext (i.e. until the next markup)

reference :: XParser Reference

Return either a general entity reference, or a character reference.

doctypedecl :: XParser DocTypeDecl

Return a DOCTYPE decl, indicating a DTD.

processinginstruction :: XParser ProcessingInstruction

Parse a processing instruction.

elemtag :: XParser ElemTag

Parse only the parts between angle brackets in an element tag.

qname :: XParser QName

Return a qualified name (although the namespace qualification is not processed here; this is merely to get the correct type).

name :: XParser Name

Return just a name, e.g. element name, attribute name.

tok :: TokenT -> XParser TokenT

Return the next token from the input only if it matches the given token.

elemOpenTag :: XParser ElemTag

For use with stream parsers - returns the complete opening element tag.

elemCloseTag :: QName -> XParser ()

For use with stream parsers - accepts a closing tag, provided it matches the given element name.

emptySTs :: SymTabs

Some empty symbol tables for GE and PE references.

type XParser a = Parser SymTabs (Posn, TokenT) a

XParser is just a specialisation of the PolyState parser.

These general utility functions don't belong here

fst3 :: (a, b, c) -> a

snd3 :: (a, b, c) -> b

thd3 :: (a, b, c) -> c