It seems that you are trying to obtain the scalar product of two vectors:
X = {x1, x2, ... , xn}
Y = {y1, y2, ... , yn}
X.Y = x1.y1 + x2.y2 + ... + xn.yn
If this is the case, have a look at my 2007 Extreme Markup Languages
presentation on FXSL 2, where this is one of the examples:
http://www.idealliance.org/papers/extreme/proceedings/xslfo-pdf/2006/Novatchev01/EML2006Novatchev01.pdf
In particular, the following XPath expression calculates the scalar
product of two vectors $vect1 and $vect2:
f:sum(f:zipWith(f:mult(), $vect1, $vect2)) (: Scalar product
of two vectors :)
--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
On Nov 7, 2007 2:18 AM, TEICHERT, Peter
<Peter(_dot_)TEICHERT(_at_)airbus(_dot_)com> wrote:
Hello XSLT users,
I am developing an XML, XSLT 2.0 based food database.
I am trying to extract and process the XML data but until now with limited
success.
The database has the following xml schema:
some of the single food ingredients ( extracted via attribute id )
<xs:element name="NAME" type="xs:normalizedString">
<xs:annotation xml:lang="de">
<xs:documentation>Bezeichnung des Lebensmittels</xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="GCAL" type="xs:nonNegativeInteger">
<xs:annotation xml:lang="de">
<xs:documentation>Energie, kcal/100g</xs:documentation>
</xs:annotation>
</xs:element>
all single food ingredients collected in food element "ing" having attribute
id
The following issues need to be solved :
1. extraction of single food ingredients
<xsl:template match="/">
<xsl:variable name="input_bls" as="item()*">
<xsl:sequence select="('B100000', 'B105100', 'B106311')"/>
</xsl:variable>
<xsl:variable name="input_amt" as="item()*">
<xsl:sequence select="(100, 50, 10)"/>
</xsl:variable>
<xsl:apply-templates select="in:ingredient/in:ing[(_at_)in:id=$input_bls]"/>
</xsl:template>
this works
2. multiplication with weight factor variable $input_amt
<xsl:template match="in:ingredient/in:ing">
<xsl:param name="input_amt">0</xsl:param>
<xsl:variable name="GCAL" select="in:GCAL * $input_amt"/>
</xsl:template>
this works with the same weight factor for every food element,
but the weight factors are different for every food element
3. sum of single food ingredients per food element
this is also unclear because step 2 is still unclear.
Can You assist me with this ?
How can I multiply a node sequence with different factors ?
best regards
Peter Teichert
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