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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Parse xslt to xdm in xslt
 The FXSL library (at https://sourceforge.net/projects/fxsl/files/FXSL%20for%20XSLT%202/FXSL%202.0/) contains an LR parser -- the function lr-parse() in the file func-lrParse.xsl it operates on an XML document that contains the LR-1 parsing tables generated from the BNF of the language. FXSL provides a modification of Berkely YACC, which, given its ordinary input -- the BNF of an LR-1 unambiguous language, produces its parsing tables -- but in the XML format expected by func-lrParse.xsl I can make available the set of BNF rules describing XPath 2.0, (or directly the LR parsing tables for it) which in the past I successfully used for parsing arbitrary XPath 2.0. If I remember well, it contains about 209 rules. Now, the lr-parse() function expects as one of its parameters a function that it will call (callback) every time a rule is reduced. One must write such functions, depending on what is the wanted processing -- for example one may want the recognized language sentence to be executed immediately -- so the programmer will write an interpreter. In another case we may want to construct a syntax tree of the parsed sentence, which can be used as an intermediate stage in a compiler. I n your case, you can provide a callback that creates the desired XDM. Another argument to this function is a lexical analyzer function -- that actually reads the raw text and emits a stream of terminal symbols. The whole (the zip files don't contain the latest content) fxsl-xslt2 library can be downloaded using this command: cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/fxsl co -P fxsl-xslt2 I am planning to move the whole FXSL library from sourceforge to github or bitbucket -- hopefully soon. Hope this helps, Dimitre On Sun, Sep 22, 2019 at 5:32 PM Rick Jelliffe <rjelliffe@a...> wrote:
Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- Sanity is madness put to good use. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it. 
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