Subject: RE: [xsl] newbie: xsl:key and summation of substrings From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Sun, 9 Dec 2001 18:07:54 -0000 |
Here are three ways to sum over a computed quantity: * Create a result tree fragment containing nodes whose value is the computed number, and use sum(xx:node-set($rtf//value)) to do the summation, where xx:node-set() is your vendor's extension function for converting an RTF to a node-set * Use a recursive named template [this is the only standard XSLT 1.0 solution] * Use the saxon extension function saxon:sum($nodes, saxon:expression(...)) Mike Kay > -----Original Message----- > From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx > [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Christopher > Giblin > Sent: 09 December 2001 17:00 > To: XSL-List@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] newbie: xsl:key and summation of substrings > > > hi > > Despite reading the faqs, I am still banging my head on basic > summation and > would appreciate help. > > I have a repeating element that looks something like this: > <disk> > <freespace>1235 MB</freespace> > </disk> > <disk> > <freespace>40 MB</freespace> > </disk> > <disk> > <freespace>75 MB</freespace> > </disk> > > > I want to sum the "freespace", but sum(//disk/freespace) > won't work because > freespace is not a number due to the trailing "MB". > Of course, sum(substring-before(//disk/freespace, ' ')) does > not work... > > So I thought the solution lies in building an index of > freespace values: > > <xsl:key name="freespace" match="//disk" use > ="substring-before(freespace,' ')"/> > > <!-- output sum of freespace values: --> > <total> > <xsl:value-of select="sum(key('freespace',.))"/> > </total> > > .. but it doesn't. > > I can not influence the content of this source document. > How do I best sum over elements which need to be substring-parsed? > > I realize this is basic. I'm just not getting the examples in the faq. > > Thanks, chris > > > > > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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