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>Design and Implementation of a validating XML parser in Haskell: Master's thesis; 
			University of Applied Sciences Wedel
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>Chapter 3. Package hparser</H1
><P
>&#13;	The following chapter describes the package <TT
CLASS="filename"
>hparser</TT
>. It contains all modules for parsing XML files and checking the well-formedness constraints of XML. Validation, normalizing attribute values and adding default values is done by the separate package <TT
CLASS="filename"
>hvalidator</TT
>.
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><P
>&#13;	The parser works internally with filters for reading XML data and processing the constructed <TT
CLASS="literal"
>XmlTree</TT
>. The whole parser works with filters of type <TT
CLASS="literal"
>XmlStateFilter</TT
> from the module <TT
CLASS="classname"
>XmlState</TT
> so that trace-output of the computations can be generated, errors can be reported and some state information can be saved where it is necessary.
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>3.1. Overview</H1
><P
>&#13;		The package <TT
CLASS="filename"
>hparser</TT
> provides five public modules for implementing an XML parser, which builds the generic tree data structure <TT
CLASS="literal"
>XmlTree</TT
> from XML documents.
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>Modules</B
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><TT
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>HdomParser</TT
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>&#13;					 Basic parser for building the generic tree data structure <TT
CLASS="literal"
>XmlTree</TT
>. Bases on <TT
CLASS="classname"
>XmlParser</TT
>, <TT
CLASS="classname"
>XmlInput</TT
> and <TT
CLASS="classname"
>DTDProcessing</TT
>.
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></DD
><DT
><TT
CLASS="function"
>XmlParser</TT
></DT
><DD
><P
>&#13;					Parses XML files. Bases on the free monadic parser combinator library Parsec [<SPAN
CLASS="citation"
><A
HREF="b2463.html#bib_parsec"
><SPAN
CLASS="abbrev"
>WWW29</SPAN
></A
></SPAN
>].
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><TT
CLASS="function"
>XmlInput</TT
></DT
><DD
><P
>Reads XML files, handles different character encodings.</P
></DD
><DT
><TT
CLASS="function"
>DTDProcessing</TT
></DT
><DD
><P
>Processes the DTD. Substitution of general and parameter entities, merging of the internal and external DTD subset.</P
></DD
><DT
><TT
CLASS="function"
>XmlOutput</TT
></DT
><DD
><P
>Prints the parsed data by using the <TT
CLASS="literal"
>XmlStateFilter</TT
> defined in module <TT
CLASS="classname"
>XmlState</TT
>.</P
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>State-I/O monad from module XmlState</TD
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