Hopefully simple XPath question

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  • Jon Thackray
    #1

    Hopefully simple XPath question

    I'm trying to use XPath to enable me to number items within sections
    in a paper. I have so far tried about ten things, all of which it
    seemed to me should work, and none of which do. Essentially what I
    want is a count of the number of sections preceding the section which
    is (the unique section) ancestor of the current node. Functionally
    this would be

    #PrecedingSibli ngs(SectionAnce storOf(CurrentN ode))

    But XPath doesn't seem to allow me to express this . I've no doubt it
    can, I just can't currently see how. Can somebody please enlighten me.
    Tags: None
    • Joris Gillis
      #2
      Re: Hopefully simple XPath question

      Hi,
      [color=blue]
      > Essentially what I want is a count of the number ofsections preceding the section which is (the uniquesection) ancestor of the current node.[/color]

      In Xpath, it would be: count(preceding ::section)

      but, it is more advisable to use the xslt approach, viz. 'xsl:number'
      so you should use something like: <xsl:number level="any" count="section"/>
      for full details, see http://www.w3.org/TR/xslt.html#number

      regards,
      --
      Joris Gillis (http://www.ticalc.org/cgi-bin/acct-v...i?userid=38041)
      Ceterum censeo XML omnibus esse utendum

        Comment

        • Jon Thackray
          #3
          Re: Hopefully simple XPath question

          jgt@pobox.com (Jon Thackray) wrote in message news:<518891d6. 0411101518.2c6c a258@posting.go ogle.com>...
          Snip

          No answer required any more, I've figured it out.

            Comment

            • Jeff Kish
              #4
              Re: Hopefully simple XPath question

              On 11 Nov 2004 13:48:55 -0800, jgt@pobox.com (Jon Thackray) wrote:
              [color=blue]
              >jgt@pobox.co m (Jon Thackray) wrote in message news:<518891d6. 0411101518.2c6c a258@posting.go ogle.com>...
              >Snip
              >
              >No answer required any more, I've figured it out.[/color]
              And the answer is... ?

                Comment

                • Jeff Kish
                  #5
                  Re: Hopefully simple XPath question

                  On Thu, 11 Nov 2004 18:56:29 GMT, "Joris Gillis" <roac@pandora.b e> wrote:
                  [color=blue]
                  >Hi,
                  >[color=green]
                  >> Essentially what I want is a count of the number ofsections preceding the section which is (the uniquesection) ancestor of the current node.[/color]
                  >
                  >In Xpath, it would be: count(preceding ::section)
                  >
                  >but, it is more advisable to use the xslt approach, viz. 'xsl:number'
                  >so you should use something like: <xsl:number level="any" count="section"/>
                  >for full details, see http://www.w3.org/TR/xslt.html#number
                  >
                  >regards,[/color]
                  Just out of curiosity, why is it more advisable? Just trying to learn here.
                  Thanks

                    Comment

                    • Joris Gillis
                      #6
                      Re: Hopefully simple XPath question

                      >> but, it is more advisable to use the xslt approach, viz. 'xsl:number'[color=blue]
                      > Just out of curiosity, why is it more advisable? Just trying to learn here.
                      > Thanks
                      >[/color]
                      Hi,

                      It was only my own humble opinion :) , I should have mentioned that...
                      Since xslt defines a (flexible) numbering system (with quite advanced features), I see no need to invent a similar function (bound to very complicated when mimicing some features of 'xsl:number') by using Xpath. So, I prefer 'xsl:number' just to keep my code neat, flexible, extensible and comprehensible.

                      You don't have to agree off course. I'm just learning too.

                      regards,

                      --
                      Joris Gillis (http://www.ticalc.org/cgi-bin/acct-v...i?userid=38041)
                      Ceterum censeo XML omnibus esse utendum

                        Comment

                        • Jon Thackray
                          #7
                          Re: Hopefully simple XPath question

                          "Joris Gillis" <roac@pandora.b e> wrote in message news:<opshbdq2j iyf9v9r@news.pa ndora.be>...[color=blue]
                          > Hi,
                          >[color=green]
                          > > Essentially what I want is a count of the number ofsections preceding the section which is (the uniquesection) ancestor of the current node.[/color]
                          >
                          > In Xpath, it would be: count(preceding ::section)[/color]

                          That doesn't quite do it. I ended up with this

                          <xsl:value-of select="1+count (ancestor::SECT ION/preceding-sibling::SECTIO N)"/>
                          [color=blue]
                          > but, it is more advisable to use the xslt approach, viz. 'xsl:number'
                          > so you should use something like: <xsl:number level="any" count="section"/>
                          > for full details, see http://www.w3.org/TR/xslt.html#number[/color]

                          I'll look into that.

                            Comment

                            • Joris Gillis
                              #8
                              Re: Hopefully simple XPath question

                              >> In Xpath, it would be: count(preceding ::section)[color=blue]
                              >
                              > That doesn't quite do it. I ended up with this
                              >
                              > <xsl:value-of select="1+count (ancestor::SECT ION/preceding-sibling::SECTIO N)"/>[/color]

                              That's strange, I would have sworn that "count(ancestor ::SECTION/preceding-sibling::SECTIO N)" gave the same result as "count(precedin g::section)" in your xml (or what I understood of it).
                              The '+1' change is logic off course.

                              regards,
                              --
                              Joris Gillis (http://www.ticalc.org/cgi-bin/acct-v...i?userid=38041)
                              Ceterum censeo XML omnibus esse utendum

                                Comment

                                • Jon Thackray
                                  #9
                                  Re: Hopefully simple XPath question

                                  "Joris Gillis" <roac@pandora.b e> wrote in message news:<opshc973s eyf9v9r@news.pa ndora.be>...[color=blue][color=green][color=darkred]
                                  > >> In Xpath, it would be: count(preceding ::section)[/color]
                                  > >
                                  > > That doesn't quite do it. I ended up with this
                                  > >
                                  > > <xsl:value-of select="1+count (ancestor::SECT ION/preceding-sibling::SECTIO N)"/>[/color]
                                  >
                                  > That's strange, I would have sworn that "count(ancestor ::SECTION/preceding-sibling::SECTIO N)" gave the same result as "count(precedin g::section)" in your xml (or what I understood of it).[/color]

                                  It went wrong in the second CHAPTER. Given document structure below,
                                  1+count(precedi ng::SECTION) gave

                                  CHAPTER
                                  SECTION Items numbered 1.1.x
                                  SECTION Items numbered 1.2.x
                                  SECTION Items numbered 1.3.x
                                  CHAPTER
                                  SECTION Items numbered 2.4.x

                                  Where I wanted

                                  CHAPTER
                                  SECTION Items numbered 1.1.x
                                  SECTION Items numbered 1.2.x
                                  SECTION Items numbered 1.3.x
                                  CHAPTER
                                  SECTION Items numbered 2.1.x
                                  [color=blue]
                                  > The '+1' change is logic off course.[/color]

                                  Just making it 1 based rather then 0 based

                                    Comment

                                    • Joris Gillis
                                      #10
                                      Re: Hopefully simple XPath question

                                      > I wanted[color=blue]
                                      >
                                      > CHAPTER
                                      > SECTION Items numbered 1.1.x
                                      > SECTION Items numbered 1.2.x
                                      > SECTION Items numbered 1.3.x
                                      > CHAPTER
                                      > SECTION Items numbered 2.1.x[/color]

                                      OK, I see.

                                      with 'xsl:number', it would be something like:

                                      <xsl:number level="any" count="CHAPTER"/><xsl:text>.</xsl:text>
                                      <xsl:number level="any" from="CHAPTER" count="SECTION"/>

                                      regards,
                                      --
                                      Joris Gillis (http://www.ticalc.org/cgi-bin/acct-v...i?userid=38041)
                                      Ceterum censeo XML omnibus esse utendum

                                        Comment

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