Re: Crazy idea
Oren Ben-Kiki wrote: > > Francis Norton <francis@xxxxxxxxxxx> wrote: > > Oren Ben-Kiki wrote: ... > > > I would add another objection - I'm not sure that XSLT is powerful > > enough to do the data-validation (as opposed to the structure > > validation) unless/until it gets regular expressions. > > Some sort of order constraints on sub elements are obviously useful. Simple > sequences with optional repeating elements are trivial to express in XSLT > (though not as elegantly as in XSchemas, I admit). Anything further becomes > hairy, but it isn't clear to me that much more is useful in practice. > > I don't see any easy way to add regular expressions to XSLT. > It's on the list of possible extensions - http://www.w3.org/TR/xslt#section-Features-under-Consideration-for-Future-Versions-of-XSLT > > On a less fundamental note, I'd also like the ability to define XSLT > > functions in XSLT, which would make programs very > > much more concise and legible. > > You can, using "named templates". > Yes, but a function call typically takes a single line, maybe less than one line. If I'm trying to keep my code legible then each parameterised named template call will take about 2+n lines where n is the number of parameters; eg: <!-- generate and implictly pass back a result object --> <xsl:call-template name="valid-choice"> <xsl:with-param name="tree-count" select="$tree-count" /> <xsl:with-param name="content-list" select="$content-list" /> <xsl:with-param name="valid-pattern" select="$valid-pattern" /> </xsl:call-template> v. <!-- [hypothetical syntax] generate and implictly pass back a result object --> fn:valid-choice($tree-count, $content-list, $valid-pattern) Cheers - Francis. XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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