how to convert xslt version 2.0 to version 1.0 - xslt

Question

i am using xslt document which uses xpath version 2 functions. I only have xalan 2.6 jar which has xslt 1.0 processor, its a constraint i cannot change it..please help me if there are any tools that convert xpath 2.0 functions to 1.0
<xsl:variable name="var1_ClinicalDocument" as="node()?" select="ns0:ClinicalDocument"/>
<DSMessage>
<DSPatient>
<xsl:for-each
select="$var1_ClinicalDocument[fn:exists(ns0:id/#root)]">
<Source>
<xsl:sequence select="fn:string(ns0:id/#root)"/>
</Source>
</xsl:for-each>
<Demographics>
<xsl:for-each select="($var1_ClinicalDocument/ns0:recordTarget/ns0:patientRole/ns0:id)[fn:exists(#extension)]">
<externalID>
<xsl:sequence select="fn:string(#extension)"/>
</externalID>
</xsl:for-each>
<xsl:for-each select="($var1_ClinicalDocument/ns0:recordTarget/ns0:patientRole/ns0:patient/ns0:name/ns0:given/node())[fn:boolean(self::text())]">
<firstName>
<xsl:sequence select="fn:string(.)"/>
</firstName>

Answer 1

Here is a mapping of the XPath 2.0 functions in question:
XPath 2.0 XPath 1.0 Xalan-Java XSLT-C
fn:exists() string-length(concat(., ) ) XPath 1.0 XPath 1.0
fn:string() string() XPath 1.0 XPath 1.0
fn:boolean() boolean() XPath 1.0 XPath 1.0
EXSLT, XSLTSL, FXSL, and XPath algorithms can fill in most of the remaining functionality.
XPath 2.0 FXSL XSLTSL EXSLT XPath 1.0
fn:max maximum math:max
fn:max dyn:max
fn:min minimum math:min
fn:min dyn:min
fn:sum sum math:sum sum
fn:sum dyn:sum
fn:avg sum div count
fn:floor floor
fn:ceiling ceiling
fn:round round
fn:abs math:abs
fn:collection foldl
op:concatenate append
fn:doc document
fn:count count
fn:not not
fn:true true
fn:false false
fn:boolean boolean
fn:upper-case str:to-upper
fn:lower-case str:to-lower
fn:substring substring
fn:string-length string-length
fn:normalize-space normalize-space
fn:translate translate
fn:concat str:concat concat
fn:substring-before substring-before
fn:substring-after substring-after
fn:reverse str:backward
fn:insert-before str:insert-at
fn:matches str:string-match
fn:tokenize str:tokenize
fn:resolve-uri uri:resolve-uri
fn:distinct-values set:distinct
op:union |
op:intersect set:intersection
op:except cmp:diff set:difference
op:is-same-node cmp:cmp
fn:position node:xpath position
fn:last last
fn:data node:type
fn:lang lang
fn:current-dateTime date:date-time
fn:dateTime dt:format-date-time date:format-date
fn:year-from-date dt:get-xsd-datetime-year date:day-in-year
fn:month-from-dateTime dt:get-xsd-datetime-month date:month-name
fn:day-from-dateTime dt:get-xsd-datetime-day date:day-name
fn:hours-from-dateTime dt:get-xsd-datetime-hour date:hour-in-day
fn:minutes-from-dateTime dt:get-xsd-datetime-minute date:minute-in-hour
fn:seconds-from-dateTime dt:get-xsd-datetime-second date:second-in-minute
fn:timezone-from-dateTime dt:get-xsd-datetime-timezone
if (...) then (...) else(...) $dynamic[$var] | $default[not($var)]
References
Xalan-Java Extensions Library
XSLTC Extensions Library
FXSL
XSieve
XSLTSL
Common XSLT Utilities
Web XSLT: XSLT and JavaScript code intended mostly for manipulating MathML and OpenMath.
XSLT Stylesheets for MathML
XPath Wikibook
XQuery 1.0 and XPath 2.0 Functions and Operators (Second
Edition)
XQuery 1.0 and XPath 2.0 Formal Semantics (Second Edition)
XQuery 1.0 and XPath 2.0 Data Model (XDM) (Second Edition)

Answer 2

I will try, but this is untested:
<xsl:variable name="var1_ClinicalDocument" select="ns0:ClinicalDocument"/>
<DSMessage>
<DSPatient>
<xsl:for-each
select="$var1_ClinicalDocument[ns0:id/#root]">
<Source>
<xsl:value-of select="ns0:id/#root"/>
</Source>
</xsl:for-each>
<Demographics>
<xsl:for-each select="($var1_ClinicalDocument/ns0:recordTarget/ns0:patientRole/ns0:id)[#extension]">
<externalID>
<xsl:value-of select="#extension"/>
</externalID>
</xsl:for-each>
<xsl:for-each select="($var1_ClinicalDocument/ns0:recordTarget/ns0:patientRole/ns0:patient/ns0:name/ns0:given/node())[self::text()]">
<firstName>
<xsl:value-of select="."/>
</firstName>
Basically the use of fn:exists, fn:string and fn:boolean can be replaced, of course if there is use of XPath/XSLT 2.0 stuff like tokenize or for-each-group you need more work and maybe Xalan specific extension functions.

Answer 3

This should be a not-bad translation:
<xsl:variable name="var1_ClinicalDocument" select="ns0:ClinicalDocument"/>
<DSMessage>
<DSPatient>
<xsl:for-each select="$var1_ClinicalDocument[ns0:id/#root]">
<Source>
<xsl:value-of select="ns0:id/#root"/>
</Source>
</xsl:for-each>
<Demographics>
<xsl:for-each select=
"($var1_ClinicalDocument/ns0:recordTarget
/ns0:patientRole/ns0:id)[#extension]">
<externalID>
<xsl:value-of select="concat(#extension, ' ')"/>
</externalID>
</xsl:for-each>
<xsl:for-each select=
"$var1_ClinicalDocument/ns0:recordTarget/ns0:patientRole
/ns0:patient/ns0:name/ns0:given/text()">
<firstName>
<xsl:value-of select="."/>
</firstName>
</xsl:for-each>
</Demographics>
</DSPatient>
</DSMessage>