Re: [xsl] Parsing XPath in XSLT?

["Wendell Piez wapiez@xxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

John L, David C, Alain, Dimitre, XSL-List,

Many thanks THIS LIST ROCKS Thank you Tommie!

Looking forward to learning more --
Wendell

On Wed, Mar 25, 2020 at 4:13 PM Dimitre Novatchev dnovatchev@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> I did such work 15 years ago, using the FXSL generic LR-1 parser (the function func-lrParse:  https://github.com/dnovatchev/FXSL-XSLT2/blob/master/f/func-lrParse.xsl  )
>
> One can find the modification to YACC to produce the LR-parsing tables in XML format, at:  https://github.com/dnovatchev/FXSL-XSLT2/tree/master/Tools/YACCX
>
> A full XPath 2.0 grammar definition in BNF, understandable by YACC, is here:  https://github.com/dnovatchev/FXSL-XSLT2/blob/master/newWork/XPATH-Grammar.y
>
> The LR-parsing tables for that XPath 2.0 grammar, produced by YACC are here:  https://github.com/dnovatchev/FXSL-XSLT2/blob/master/newWork/XPATH-ParseTables.xml
>
> And a test that parses several (randomly chosen by me at the time) XPath 2.0 expressions is here:  https://github.com/dnovatchev/FXSL-XSLT2/blob/master/newWork/XPathParse1.xsl
>
> Cheers,
> Dimitre
>
>
>
> On Wed, Mar 25, 2020 at 10:31 AM Wendell Piez wapiez@xxxxxxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>> XSL Friends,
>>
>> What kinds of advice can you offer on the question of parsing XPath in XSLT?
>>
>> I am currently having to interpret XPath or (more likely) an XPath
>> subset into an abstract representation that can be rewritten into
>> various forms. Naturally I would like to do this out of a parse tree
>> or the functional equivalent, represented in some sort of XML, since
>> serializing that back out is easy enough. It is producing that tree
>> that is a problem. I need a parser for XPath or if not for all of
>> XPath, then at least for my subset -- which includes namespaces. So
>> even if partial the model must expose names and namespaces to the
>> extent that a path rewriter can (for example) map into a new set of
>> namespace prefixes --
>>
>> Any thoughts? Open source projects I should take a look at? Have the
>> community-standards initiatives captured any good work in this area?
>>
>> Best regards,
>> Wendell
>>
>> --
>> ...Wendell Piez... ...wendell -at- nist -dot- gov...
>> ...wendellpiez.com... ...pellucidliterature.org... ...pausepress.org...
>> ...github.com/wendellpiez... ...gitlab.coko.foundation/wendell...
>>
>
>
> --
> Cheers,
> Dimitre Novatchev
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-- 
...Wendell Piez... ...wendell -at- nist -dot- gov...
...wendellpiez.com... ...pellucidliterature.org... ...pausepress.org...
...github.com/wendellpiez... ...gitlab.coko.foundation/wendell...