Subject: Re: [xsl] How to do macro substitution in XPath? From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Sat, 2 Dec 2023 17:57:07 -0000 |
Here is the wanted "pure XPath" that preserves the "readability": let $LBJ := /Book/Title eq 'Path to Power' and /Book/Author eq 'Robert A. Caro', $RM := /Book/Title eq 'Power Broker' and /Book/Author eq 'Robert A. Caro' return if($LBJ) then 'action 1' else if($RM) then 'action 2' else 'Error' On Sat, Dec 2, 2023 at 7:36b/AM Roger L Costello costello@xxxxxxxxx < xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > Hi Folks, > > I am converting prose like this: > > If the title = "Path to Power" and the author = "Robert A. Caro" (Lyndon > Baines Johnson (LBJ)), then > process LBJ as follows > action 1 > If the title = "Power Broker" and the author = "Robert A. Caro" (Robert > Moses (RM)), then > process RM as follows > action 2 > Neither LBJ nor RM > action 3 > > I need the XPath to be as like the prose as possible. > > Suppose the XPath will operate on XML documents like this: > > <Book> > <Title>Path to Power</Title> > <Author>Robert A. Caro</Author> > </Book> > > Below is one approach to writing the XPath. See the XPath in the > xsl:value-of element. Notice the use of XML ENTITIES. > > The advantage of that approach is the XPath looks like the prose. > > The disadvantage with that approach is that ENTITIES are not XPath. I need > to stick with pure XPath. What XPath do you recommend? > > <?xml version="1.0" encoding="UTF-8"?> > <!DOCTYPE xsl:stylesheet[ > <!ENTITY LBJ "((/Book/Title eq 'Path to Power') and (/Book/Author eq > 'Robert A. Caro'))"> > <!ENTITY RM "((/Book/Title eq 'Power Broker') and (/Book/Author eq > 'Robert A. Caro'))"> > ]> > <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > version="3.0"> > <xsl:template match="/"> > <xsl:value-of select=" > if &LBJ; then > 'action 1' > else if &RM; then > 'action 2' > else if (not((&LBJ;) or (&RM;))) then > 'action 3' > else > 'Error' > "/> > </xsl:template> > </xsl:stylesheet> > > > -- 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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