XSL conversion from 2.0 - xslt

Question

I have a problem converting XSLT 2.0 to XSLT 3.0. I want to use the streaming capability of XSLT 3.0. I am struggling with using the <xsl:stream> and <xsl:mode> tags as XSLT 3.0 has several restrictions. For using XSLT 3.0 streaming capabilities, following restrictions are faced:
“Sibling nodes and ancestor sibling are not reachable”.
"You can visit child nodes only once"
"You have access only to the current element attributes and namespace declaration"
How can I overcome these restrictions? Can anyone please help me?
<?xml version="1.0" encoding="UTF-8">
<xsl:stream href="SampleInput3_0.xml">
<xsl:for-each select="copy-of(ns0:ORM_O01/ns0:ORM_O01.PATIENT/ns0:PID)">
<Patient>
<ucfd:Name>
<xsl:variable name="varFirst_Name" as="node()" select="ns0:PID.5/ns0:XPN.2[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]" />
<xsl:variable name="varLast_Name" as="node()" select="ns0:XPN.1/ns0:FN.1[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]" />
<xsl:attribute name="value" namespace="" select="concat(string($varFirst_Name), string(varLast_Name))" />
</ucfd:Name>
<ucfd:FirstName value="{ns0:PID.5/ns0:XPN.2[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:LastName value="{ns0:PID.5/ns0:XPN.1/ns0:FN.1}" />
<ucfd:MiddleName value="{ns0:PID.5/ns0:XPN.3[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Prefix value="{ns0:PID.5/ns0:XPN.5[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Suffix value="{ns0:PID.5/ns0:XPN.4[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Identification>
<ucfd:TaxIdentifier>
<ucfd:Type value="{ns0:PID.18/ns0:CX.5[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Identifier value="{ns0:PID.18/ns0:CX.1}" />
</ucfd:TaxIdentifier>
</ucfd:Identification>
<xsl:for-each select="ns0:PID.11">
<ucfd:Address>
<xsl:if test="exists(#Type)">
<ucfd:Type value="{ns0:XAD.7[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
</xsl:if>
<ucfd:City value="{ns0:XAD.3[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:State value="{ns0:XAD.4[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:PostalCode value="{ns0:XAD.5[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Country value="{ns0:XAD.6[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:County value="{ns0:XAD.9[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
</ucfd:Address>
</xsl:for-each>
<ucfd:Contact>
<ucfd:Role value="{ns0:PID.13/ns0:XTN.2[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Type value="{ns0:PID.13/ns0:XTN.3[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<xsl:for-each select="ns0:PID.13">
<!--<xsl:variable name="var9_current" as="node()" select="."/>-->
<ucfd:CommunicationNumber>
<xsl:if test="exists(#Type)">
<ucfd:Type>
<xsl:sequence select="()" />
</ucfd:Type>
</xsl:if>
<ucfd:Identifier>
<!--<xsl:variable name="var8_current" as="node()" select="ns0:XTN.5[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]"/>
<xsl:variable name="var7_current" as="node()" select="ns0:XTN.6[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]"/>
<xsl:variable name="var6_current" as="node()" select="ns0:XTN.7[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]"/>
<xsl:variable name="var5_current" as="node()" select="ns0:XTN.8[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]"/>
<xsl:variable name="var4_current" as="node()" select="ns0:XTN.10[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]"/>
<xsl:variable name="var3_current" as="node()" select="ns0:XTN.11[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]"/>
<xsl:attribute name="value" namespace="" select="concat(concat(concat(concat(concat(string($var8_current), string($var7_current)), string($var6_current)), string($var5_current)), string($var4_current)), string($var3_current))"/> -->
</ucfd:Identifier>
</ucfd:CommunicationNumber>
</xsl:for-each>
</ucfd:Contact>
<ucfd:Demographics>
<ucfd:BirthDate>
<xsl:sequence select="()" />
</ucfd:BirthDate>
<ucfd:BirthSequenceNumber>
<xsl:for-each select="ns0:ORM_O01/ns0:ORM_O01.PATIENT/ns0:PID/ns0:PID.25">
<xsl:attribute name="value" namespace="">
<xsl:if test="not((translate(string(#xsi:nil), 'true ', '1') = '1'))">
<xsl:sequence select="xs:string(xs:integer(string(.)))" />
</xsl:if>
</xsl:attribute>
</xsl:for-each>
</ucfd:BirthSequenceNumber>
<ucfd:DeathDate>
<xsl:sequence select="()" />
</ucfd:DeathDate>
<ucfd:Gender value="ns0:PID.8[not((translate(string(#xsi:nil), 'true ', '1') = '1'))]" />
<ucfd:MaritalStatus value="{ns0:PID.16/ns0:CE_0002.1[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:CitizenshipStatus value="{ns0:PID.26[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:RaceOrEthnicity>
<ucfd:Race value="{ns0:PID.10/ns0:CE_0005.1[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
</ucfd:RaceOrEthnicity>
<ucfd:Religion value="{ns0:PID.17/ns0:CE_0006.2[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
</ucfd:Demographics>
<ucfd:Language>
<ucfd:LanguageCode value="{ns0:PID.15/ns0:CE_0296.1[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:Description value="{ns0:PID.15/ns0:CE_0296.2[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
<ucfd:UseIndicator value="{ns0:PID.15/ns0:CE_0296.3[not(translate(#xsi:nil, 'true ', '1') = '1')]}" />
</ucfd:Language>
</Patient>
</xsl:for-each>
</xsl:stream>
</MemberRecord>
</xsl:template>
</xsl:stylesheet>

Answer 1

I think you should follow the approach in http://saxonica.com/documentation/index.html#!sourcedocs/streaming/burst-mode-streaming so along the lines of
<xsl:stylesheet
version="3.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ns0="..."
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="..." xmlns:ccfd="..." xmlns:hcfd="..." xmlns:ucf="..." xmlns:ucfd="..."
exclude-result-prefixes="ns0 xs">
<xsl:output method="xml" encoding="UTF-8" byte-order-mark="no" indent="yes"/>
<!-- start with this named template -->
<xsl:template name="main">
<MemberRecord xsi:schemaLocation="...">
<Patient>
<xsl:stream href='employees.xml'>
<xsl:apply-templates select="copy-of(ns0:ORM_O01/ns0:ORM_O01.PATIENT/ns0:PID)"/>
</xsl:stream>
</Patient>
</MemberRecord>
</xsl:template>
<xsl:template match="ns0:PID">
<ucfd:Name value="{...}"/>
<ucfd:FirstName value="{ns0:PID.5/ns0:XPN.2[not(translate(#xsi:nil, 'true ', '1') = '1'))]}"/>
<ucfd:LastName value="{ns0:PID.5/ns0:XPN.1/ns0:FN.1}"/>
<!-- compute the other elements and attributes here as above -->
</xsl:template>
</xsl:stylesheet>
That should show the approach, you will have to add code for the remaining elements like middle name and prefix and so on. I have also tried to simplify the compuation of the attribute value in some cases, I think the same can be done for the other cases but I think you should ask that in a different question where you provide details of the XML structure and the values you want to compute, all those nested for-eachs to generate a single value attribute seem a bit convoluted.
Also note that I have followed your posted code in creating a single Patient element, I would however expected that a ns0:ORM_O01.PATIENT element is mapped to a Patient so more along the lines of
<xsl:stylesheet
version="3.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ns0="..."
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="..." xmlns:ccfd="..." xmlns:hcfd="..." xmlns:ucf="..." xmlns:ucfd="..."
exclude-result-prefixes="ns0 xs">
<xsl:output method="xml" encoding="UTF-8" byte-order-mark="no" indent="yes"/>
<!-- start with this named template -->
<xsl:template name="main">
<MemberRecord xsi:schemaLocation="...">
<xsl:stream href='employees.xml'>
<xsl:apply-templates select="copy-of(ns0:ORM_O01/ns0:ORM_O01.PATIENT)"/>
</xsl:stream>
</Patient>
</MemberRecord>
</xsl:template>
<xsl:template match="ns0:ORM_O01.PATIENT">
<Patient>
<xsl:apply-templates/>
</Patient>
</xsl:template>
<xsl:template match="ns0:PID">
<ucfd:Name value="{...}"/>
<ucfd:FirstName value="{ns0:PID.5/ns0:XPN.2[not(translate(#xsi:nil, 'true ', '1') = '1'))]}"/>
<ucfd:LastName value="{ns0:PID.5/ns0:XPN.1/ns0:FN.1}"/>
<!-- compute the other elements and attributes here as above -->
</xsl:template>
</xsl:stylesheet>