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问题:
Given XML snippet of:
<forms> <FORM lob="BO" form_name="AI OM 10"/> <FORM lob="BO" form_name="CL BP 03 01"/> <FORM lob="BO" form_name="AI OM 107"/> <FORM lob="BO" form_name="CL BP 00 02"/> <FORM lob="BO" form_name="123 DDE"/> <FORM lob="BO" form_name="CL BP 00 02"/> <FORM lob="BO" form_name="AI OM 98"/> </forms>
I need to sort the FORM nodes by form_name alphabetically so all the forms containing 'AI OM' in the form_name are grouped together and then within that they are in numeric order by the integers (same for other forms).
The form_name can be is open season as letters and numbers can be in any order:
XX ## ##
XX XX ##
XX XX ###
XX XX ## ##
XX ###
XX XXXX
'## XXX
XXX###
What I THINK needs to happen is that string needs to be split between alpha and numeric. The numeric part could probably be sorted with any spaces removed I suppose.
I am at a loss as to how to split the string and then cover all the sorting/grouping combinations given that there are no rules around the 'form_name' format.
We are using XSLT 2.0. Thanks.
回答1:
This transformation:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output omit-xml-declaration="yes" indent="yes"/> <xsl:variable name="vDigits" select="'0123456789 '"/> <xsl:variable name="vAlpha" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ '"/> <xsl:template match="/*"> <forms> <xsl:for-each select="FORM"> <xsl:sort select="translate(@form_name,$vDigits,'')"/> <xsl:sort select="translate(@form_name,$vAlpha,'')" data-type="number"/> <xsl:copy-of select="."/> </xsl:for-each> </forms> </xsl:template> </xsl:stylesheet>
when applied on the provided XML document:
<forms> <FORM lob="BO" form_name="AI OM 10"/> <FORM lob="BO" form_name="CL BP 03 01"/> <FORM lob="BO" form_name="AI OM 107"/> <FORM lob="BO" form_name="CL BP 00 02"/> <FORM lob="BO" form_name="123 DDE"/> <FORM lob="BO" form_name="CL BP 00 02"/> <FORM lob="BO" form_name="AI OM 98"/> </forms>
produces the wanted, correct result:
<forms> <FORM lob="BO" form_name="AI OM 10"/> <FORM lob="BO" form_name="AI OM 98"/> <FORM lob="BO" form_name="AI OM 107"/> <FORM lob="BO" form_name="CL BP 00 02"/> <FORM lob="BO" form_name="CL BP 00 02"/> <FORM lob="BO" form_name="CL BP 03 01"/> <FORM lob="BO" form_name="123 DDE"/> </forms>
Do note:
Two <xsl:sort> instructions implement the two-phase sorting
The XPath translate() function is used to produce either the alpha-only sort-key or the digits-only sort-key.
回答2:
This stylesheet:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="node()|@*"> <xsl:copy> <xsl:apply-templates select="node()|@*"/> </xsl:copy> </xsl:template> <xsl:template match="forms"> <xsl:apply-templates> <xsl:sort select="normalize-space( translate(@form_name, '0123456789', ''))"/> <xsl:sort select="substring-before( concat( normalize-space( translate(@form_name, translate(@form_name, '0123456789 ', ''), '')), ' '),' ')" data-type="number"/> <xsl:sort select="substring-after( normalize-space( translate(@form_name, translate(@form_name, '0123456789 ', ''), '')), ' ')" data-type="number"/> </xsl:apply-templates> </xsl:template> </xsl:stylesheet>
Output:
<FORM lob="BO" form_name="AI OM 10"></FORM> <FORM lob="BO" form_name="AI OM 98"></FORM> <FORM lob="BO" form_name="AI OM 107"></FORM> <FORM lob="BO" form_name="CL BP 00 02"></FORM> <FORM lob="BO" form_name="CL BP 00 02"></FORM> <FORM lob="BO" form_name="CL BP 03 01"></FORM> <FORM lob="BO" form_name="123 DDE"></FORM>
XSLT 2.0 solution: this stylesheet
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xsl:output method="xml" indent="yes"/> <xsl:template match="node()|@*"> <xsl:copy> <xsl:apply-templates select="node()|@*"/> </xsl:copy> </xsl:template> <xsl:template match="forms"> <xsl:apply-templates> <xsl:sort select="string-join(tokenize(@form_name,' ') [not(. castable as xs:integer)], ' ')"/> <xsl:sort select="xs:integer(tokenize(@form_name,' ') [. castable as xs:integer][1])"/> <xsl:sort select="xs:integer(tokenize(@form_name,' ') [. castable as xs:integer][2])"/> </xsl:apply-templates> </xsl:template> </xsl:stylesheet>
回答3:
It should be noted that the marked answer doesn't work in all cases.
Input:
<forms> <FORM lob="BO" form_name="AA 11 AB"/> <FORM lob="BO" form_name="AA AZ 01"/> </forms>
Expected Output:
<forms> <FORM lob="BO" form_name="AA AZ 01"/> <FORM lob="BO" form_name="AA 11 AB"/> </forms>
Actual Output:
<forms> <FORM lob="BO" form_name="AA 11 AB"/> <FORM lob="BO" form_name="AA AZ 01"/> </forms>
If letters are allowed after numbers, you cannot strip them out in the first sort key.
