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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!--Rendered using the Haskell Html Library v0.2-->
<HTML
><HEAD
><TITLE
>Text.XML.HaXml.Verbatim</TITLE
><LINK HREF = "haddock.css" REL = "stylesheet" TYPE = "text/css"
></HEAD
><BODY
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD CLASS = "topbar"
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD
><IMG SRC = "haskell_icon.gif" WIDTH = "16" HEIGHT = "16" ALT = " "
></TD
><TD CLASS = "title"
>HaXml</TD
><TD CLASS = "topbut"
><A HREF = "index.html"
>Contents</A
></TD
><TD CLASS = "topbut"
><A HREF = "doc-index.html"
>Index</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS = "modulebar"
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD
><FONT SIZE = "6"
>Text.XML.HaXml.Verbatim</FONT
></TD
><TD ALIGN = "right"
><TABLE CLASS = "narrow" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD CLASS = "infohead"
>Portability</TD
><TD CLASS = "infoval"
> portable</TD
></TR
><TR
><TD CLASS = "infohead"
>Stability</TD
><TD CLASS = "infoval"
> experimental</TD
></TR
><TR
><TD CLASS = "infohead"
>Maintainer</TD
><TD CLASS = "infoval"
> simons@cryp.to</TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
></TABLE
></TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "section1"
>Description</TD
></TR
><TR
><TD CLASS = "doc"
><P
>The preferred method for rendering a <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3ADocument"
>Document</A
></TT
> or single <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AContent"
>Content</A
></TT
>
is by using the pretty printing facility defined in <A HREF = "Pretty.html"
>Pretty</A
>.
Pretty-printing does not work well for cases, however, where the
formatting in the XML document is significant. Examples of this
case are XHTML's <TT
><pre></TT
> tag, Docbook's <TT
><literallayout></TT
> tag,
and many more.
</P
><P
>Theoretically, the document author could avoid this problem by
wrapping the contents of these tags in a <![CDATA[...]]> section,
but often this is not practical, for instance when the
literal-layout section contains other elements. Finally, program
writers could manually format these elements by transforming them
into a literal string in their CFliter, etc., but this is
annoying to do and prone to omissions and formatting errors.
</P
><P
>As an alternative, this module provides the function <TT
><A HREF = "Text.XML.HaXml.Verbatim.html#v%3Averbatim"
>verbatim</A
></TT
>,
which will format XML <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AContent"
>Content</A
></TT
> as a String while retaining the
formatting of the input document unchanged.
</P
><P
><EM
>Know problems</EM
>:
</P
><UL
><LI
> HaXml's parser eats line feeds between two tags.
</LI
><LI
> <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AAttribute"
>Attribute</A
></TT
>s should be formatted by making them an instance of
<TT
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
></TT
> as well, but since an <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AAttribute"
>Attribute</A
></TT
> is just a tuple,
not a full data type, the helper function <TT
><A HREF = "Text.XML.HaXml.Verbatim.html#v%3AverbAttr"
>verbAttr</A
></TT
> must be
used instead.
</LI
><LI
> <TT
><A HREF = "Text.XML.HaXml.Types.html#v%3ACMisc"
>CMisc</A
></TT
> is not yet supported.
</LI
><LI
> <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AElement"
>Element</A
></TT
>s, which contain no content, are formatted as
<TT
><element-name/></TT
>, even if they were not defined as being of
type <TT
>EMPTY</TT
>. In XML this perfectly alright, but in SGML it is
not. Those, who wish to use <TT
><A HREF = "Text.XML.HaXml.Verbatim.html#v%3Averbatim"
>verbatim</A
></TT
> to format parts of say
an HTML page will have to (a) replace problematic elements by
literals <EM
>before</EM
> running <TT
><A HREF = "Text.XML.HaXml.Verbatim.html#v%3Averbatim"
>verbatim</A
></TT
> or (b) use a second
search-and-replace stage to fix this.
</LI
></UL
></TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "section1"
>Synopsis</TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "body"
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD CLASS = "decl"
><SPAN CLASS = "keyword"
>class</SPAN
> <A HREF = "#t%3AVerbatim"
>Verbatim</A
> a <SPAN CLASS = "keyword"
>where</SPAN
></TD
></TR
><TR
><TD CLASS = "body"
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD CLASS = "decl"
><A HREF = "#v%3Averbatim"
>verbatim</A
> :: a -> String</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS = "s8"
></TD
></TR
><TR
><TD CLASS = "decl"
><A HREF = "#v%3AverbAttr"
>verbAttr</A
> :: <A HREF = "Text.XML.HaXml.Types.html#t%3AAttribute"
>Attribute</A
> -> String</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "section1"
>Documentation</TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "decl"
><SPAN CLASS = "keyword"
>class</SPAN
> <A NAME = "t%3AVerbatim"
></A
><B
>Verbatim</B
> a <SPAN CLASS = "keyword"
>where</SPAN
></TD
></TR
><TR
><TD CLASS = "body"
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD CLASS = "ndoc"
>This class promises that the function <TT
><A HREF = "Text.XML.HaXml.Verbatim.html#v%3Averbatim"
>verbatim</A
></TT
> knows how to
format this data type into a string without changing the
formatting.</TD
></TR
><TR
><TD CLASS = "s8"
></TD
></TR
><TR
><TD CLASS = "section4"
>Methods</TD
></TR
><TR
><TD CLASS = "body"
><TABLE CLASS = "vanilla" CELLSPACING = "0" CELLPADDING = "0"
><TR
><TD CLASS = "decl"
><A NAME = "v%3Averbatim"
></A
><B
>verbatim</B
> :: a -> String</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS = "s8"
></TD
></TR
><TR
><TD CLASS = "section4"
>Instances</TD
></TR
><TR
><TD CLASS = "body"
><TABLE CLASS = "vanilla" CELLSPACING = "1" CELLPADDING = "0"
><TR
><TD CLASS = "decl"
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> a => <A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> [a]</TD
></TR
><TR
><TD CLASS = "decl"
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> Char</TD
></TR
><TR
><TD CLASS = "decl"
>(<A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> a, <A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> b) => <A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> (Either a b)</TD
></TR
><TR
><TD CLASS = "decl"
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> <A HREF = "Text.XML.HaXml.Types.html#t%3AContent"
>Content</A
></TD
></TR
><TR
><TD CLASS = "decl"
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> <A HREF = "Text.XML.HaXml.Types.html#t%3AElement"
>Element</A
></TD
></TR
><TR
><TD CLASS = "decl"
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
> <A HREF = "Text.XML.HaXml.Types.html#t%3AReference"
>Reference</A
></TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "decl"
><A NAME = "v%3AverbAttr"
></A
><B
>verbAttr</B
> :: <A HREF = "Text.XML.HaXml.Types.html#t%3AAttribute"
>Attribute</A
> -> String</TD
></TR
><TR
><TD CLASS = "doc"
>This is a helper function is required because Haskell does not
allow to make an ordinary tuple (like <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AAttribute"
>Attribute</A
></TT
>) an instance of a
class. The resulting output will preface the actual attribute with
a single blank so that lists of <TT
><A HREF = "Text.XML.HaXml.Types.html#t%3AAttribute"
>Attribute</A
></TT
>s can be handled
implicitly by the definition for lists of <TT
><A HREF = "Text.XML.HaXml.Verbatim.html#t%3AVerbatim"
>Verbatim</A
></TT
> data types.</TD
></TR
><TR
><TD CLASS = "s15"
></TD
></TR
><TR
><TD CLASS = "botbar"
>Produced by <A HREF = "http://www.haskell.org/haddock/"
>Haddock</A
> version 0.6</TD
></TR
></TABLE
></BODY
></HTML
>
|
