[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Fwd: xsl:key() and $variables.
On Fri, 21 Jul 2006 18:42:29 -0400 Steve <subsume@xxxxxxxxx> wrote: > ---------- Forwarded message ---------- > From: Steve <subsume@xxxxxxxxx> > Date: Jul 20, 2006 3:41 PM > Subject: xsl:key() and $variables. > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > > > I have a variable containing > > <Records> > <Record> > <activity>Baseball</ > <hours>36</ > <Record> > <activity>Shopping</ > <hours>39</ > <Record> > <activity>Writing</ > <hours>3</ > ......etc (yes, I know they're not closed.) > > and some xml (document('../blah.xml') containing... > > <activities> > <activity neccesary="no">Baseball</ > <activity neccesary="no">Shopping</ > <activity neccesary="yes">Writing</ > > .............. > > How do I <xsl:apply-templates select="$variable/Records/Record[1]" /> > only those records which are neccesary="yes" ? First, I don't think XSLT was designed to do SQL style joins. It's not a database API. But. That doesn't mean you can't do it. You could do a call-template() that does for-each on activities/activity[@necessary='yes'] and return the Record that has an activity/text() equal to the desired activity. > I swear one of these posts I'll have xsl:key figured out. I've never heard of xsl:key but the second illustration here: http://www.cranesoftwrights.com/resources/xslkeys/index.htm looks useful. It seems an xsl:key is like a variable containing a list of elements that match the xpath expression. But the key() function allows you to filter on that list further by providing a key (overloaded term warning). So in the above illustration the xsl:key statement builds a list of Employee elements and indicates that the SSN child should be used when a key is supplied to the key() function. So the key('people',@emp) call says, "fetch all elements in the 'people' list using the SSN @emp. Presumably each Employee would have a unique SSN and therefore the key() call will return one Element. Mike -- Michael B Allen PHP Extension for SSO w/ Windows Group Authorization http://www.ioplex.com/
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