Upconversion using XSLT 2.0

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Up-conversionusing XSLT 2.0

• Michael Kay
• XML 2004
• 16 November 2004

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A Plug
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Up-Conversion

• What is it?
• XSLT 2.0 Facilities
• An example

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A Definition
Up-conversion detects implicit structure and
converts it into explicit markup
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Relevant Facilities in XSLT 2.0

• unparsed-text() function
• reads plain text files
• analyze-string
• regex-based string manipulation
• for-each-group
• turns flat element sequences into nested tree
  structures
• result tree validation
• ensures that the result matches the target schema

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ltxslanalyze-stringgt example
ltxslanalyze-string selectabstract
regex\.?\gt
ltxslmatching-substringgt ltcitationgtltxslvalu
e-of select./gtlt/citationgt
lt/xslmatching-substringgt ltxslnon-matching-sub
stringgt ltxslvalue-of select./gt
lt/xslnon-matching-substringgt lt/xslanalyze-string
gt
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ltxslfor-each-groupgt example
ltxslfor-each-group selectemployee
group-bydepartmentgt
lth2gtltxslvalue-of selectcurrent-grouping-key()/
gtlt/h2gt ltxslfor-each selectcurrent-group()gt
lth3gtEmployee ltxslvalue-of
selectname/gtlt/h3gt lttablegt
ltxslfor-each select except (name,
department) gt lttrgt
lttdgtltxslvalue-of selectname()/gtlt/tdgt
lttdgtltxslvalue-of select./gtlt/tdgt
lt/trgt lt/xslfor-eachgt lt/tablegt
lt/xslfor-eachgt lt/xslfor-each-groupgt
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A Case Study
XHTML
GEDCOM5.5legacydata
GEDCOM5.5encoded in XML
GEDCOM6.0
PDF
c
GEDCOM6.0Schema
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Summary

• Up-conversion converts implicit structure to
  explicit markup
• Supported by
• unparsed-text()
• xslanalyze-string
• xslfor-each-group
• result tree validation
• Extends the reach of XSLT as a tool