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XML Parser

Curtisma

What's the best way to parse an XML file into a SKILL or SKILL++ data structure?

I found an old post, listed below, on parsing xml files using xsltproc.  However I am receiving errors about the xslt file when I test it on an example xml file.  Is there an updated version of this xslt file available?

https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/12948/xml-in-skill/19209#19209

I've also seen suggestions that a LISP xml parser be used.  Does anybody have any experience with going this route?  Have you tried to use the closure xml parser for it?

common-lisp.net/.../

-Curtis

  • Curtis,

    There are some internal (private) SKILL APIs to read XML, but they're not public (one is based on a LISP xml parser). So nothing public for now.

    The XSLT file got mangled by the forum display (quotation marks mainly). So I edited the post you're referencing and attached the original file as an attachment (at the bottom). Give that a try...

    Regards,

    Andrew.

  • in reply to Andrew Beckett

    Thanks Andrew!  I just ran xsltproc with the fixed xslt file and no longer see any errors.  I'll try the rest of the process now.

    Any comments on the best way to write an XML file?

    In that same post you provided an option, abHtml.ils.  Would you still suggest using it?  If so, have you made any updates to it?

    Thanks,

    Curtis

  • in reply to Andrew Beckett
    Andrew Beckett said:
    There are some internal (private) SKILL APIs to read XML, but they're not public (one is based on a LISP xml parser). So nothing public for now.

    Are they truly private or just undocumented?  Could I still use them at my own risk?

    -Curtis

  • in reply to Curtisma

    Hi Curtis,

    First of all, I updated the other post to add the abHtml.ils file as an attachment - because the code contains HTML tags, it got mangled slightly. The version is the same, but the formatting of the forum site broke the code.

    The APIs are actually developed by my team - they are both private and undocumented. They were added for a specific application, and may at some point in the future be ready for mainstream use, but I think I'd be reluctant to suggest that you use them now.

    Regards,

    Andrew.

  • The attachment is a xml reader in Skill that I did as proof-of-concept for automatic parser generation some time ago. The parser itself is of LALR1 type, automata of lexer and parser are generated directly from EBNF. The grammar is visible in the comments at the reduce rules and should cover all of XML1.0 and probably also most of XML1.1 spec (not tested though), but is limited to 8bit extended ASCII characters only.

    The reductions are manually written to generate disembodied property lists (and lists of those) out of parsed xml nodes/content/attributes. This could be modified to build plain lists, tables, or whatever structure is needed.

    Usage is to call it with the xml in a string or a filename. An optional callback can be given to enable somewhat similar to SAX mode.

    5852.xml.zip

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