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Re: Dealing mixed content with invalid node-like text

Subject: Re: Dealing mixed content with invalid node-like text
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Mon, 05 Dec 2011 00:15:37 +0000
Re:  Dealing mixed content with invalid node-like text
If you need to read a file in a format that is not XML, then in general I would suggest you start by defining a BNF grammar for the language you want to accept, and then write a parser for that grammar using the usual parsing techniques (top-down or bottom-up) taught in every computer science course. If the language is similar to XML, then it is too complex to parse using regular expressions.

Michael Kay

On 04/12/2011 19:15, Karlmarx R wrote:


I have a situation where in I need to deal mixed content text that also come with text wthin angle brackets, converted to XML output. For example, texts like:

"Sometext<xx>within valid node</xx>  and like<II .>  Title etc"
"Sometext like<1a .>  Title etc,<xx>within<b>something</b>  valid node</xx>  etc".

Now, the output has to be like:

<nodename>Sometext<xx>within valid node</xx>  and like&lt;II .&gt; Title etc</nodename>
<nodename>Sometext like&lt;1a .&gt; Title etc,<xx>within<b>something</b>  valid node</xx>  etc</nodename>

At present I do not get things like<br/> but assume I get so, it being valid, I should treat it as node. The point I am trying to make is,<II .> and<1a .> like non-node things needs to be treated removing their angle brackets to make the XML valid. Currently I use analyze-string with a regex to deal this, which does not work correctly (due to mistakes). But I would like to know whether there is good standard solution to deal with these sort of text. At present each line of text is passed to this template and treated like:

<xsl:template name="tag-text">
                         <xsl:param name="unparsed" required="yes"/>
                         <xsl:analyze-string select="$unparsed" regex="^(.*?)&lt;(.+)&gt;(.*)&lt;/(.+)&gt;(.*?)$">    <!-- this regex has flaws, in that fails to treat those invalid nodes -->
                                     <xsl:matching-substring>  ** do process and if necessary recuressively call this template again **</xsl:matching-substring>
                                                 <xsl:value-of select="."/>

I suspect possibly there could be a better regex to get the solution I wanted, but not sure whether xslt itself has better way to deal this. Pls can you suggest possible solutions (incl better regex if any of you used it successfully).

Thanks in advance,

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