Subject: Re: [xsl] Filtering, xslt 2.0 From: "Graydon graydon@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Mon, 31 Oct 2022 17:49:24 -0000 |
On Mon, Oct 31, 2022 at 05:24:11PM -0000, Dave Pawson dave.pawson@xxxxxxxxx scripsit: > On Mon, 31 Oct 2022 at 16:47, Graydon graydon@xxxxxxxxx > <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, Oct 31, 2022 at 04:35:10PM -0000, Dave Pawson dave.pawson@xxxxxxxxx scripsit: > > > <grin/> Not yet (will I ever be?) familiar with xslt 3.0 > > > > Two has the sequence concept. > > > > param="a;b;c;d" > > > > <xsl:param name="rawMatch" as="xs:string" /> > > <xsl:variable name="matchOptions" as="xs:string+" > > select="tokenize($rawMatch,';')" /> > > (assume xslt 2.) - OK, happy with that. That should be completely fine in 2.0. > > Then the sequence-equals test will return true if it's any of the > > values in the param. > > Sequence-equals? 3.0? function? Google hasn't found this Graydon? In XPath 2.0 or greater, 'eq' is the "are these two atomic values the same?" test. ("comparison of values", sometimes.) So $A eq $B works if neither $A or $B have more than one value, but will throw an error if either is a sequence of two or more items. The equals sign, =, U+003D, is the comparison on sequences. It returns true if ANY member of $A can be found in $B. (So (1,2,3) = (3,4,5). Also, (1,2,3) != (3,4,5) because some member of $A is NOT found in $B.) So you should be able to use <xsl:template match="data[membership = $matchOptions]"/> ... </xsl:template> and have it match all the data elements with membership element children where the string value of the element is equal to one of the string values in the $matchOptions sequence of strings. (I believe I have found where in the specs it discusses this before, but it's not easy to find and I do not presently recall which specification I should be looking at. Making this easier to find would be a useful thing in 4.0, should XPath 4.0 there be.) -- Graydon Saunders | graydonish@xxxxxxxxx ^fs oferiode, pisses swa mfg. -- Deor ("That passed, so may this.")
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