An XML Patch Operations Framework Utilizing XPath Selectors Jari - - PowerPoint PPT Presentation

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An XML Patch Operations Framework Utilizing XPath Selectors Jari - - PowerPoint PPT Presentation

Jan 12, 2023 530 likes •592 views

An XML Patch Operations Framework Utilizing XPath Selectors Jari Urpalainen IETF63 Paris Changes I-D name change: XCAP -> XML Supports a full set of XPath 1.0 datamodel nodes (except the root node) Deterministic model to handle

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SLIDE 1

An XML Patch Operations Framework Utilizing XPath Selectors

Jari Urpalainen IETF63 Paris

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SLIDE 2

Changes

  • I-D name change: XCAP -> XML
  • Supports a full set of XPath 1.0

datamodel nodes (except the root node)

  • Deterministic model to handle whitespace

text nodes in <add> and <remove>

  • ABNF replaced with the W3C Schema

patterns (regular expressions)

  • Selection of elements with attached

default namespace simplified

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SLIDE 3

Issues

  • Clarify namespace prefix selections
  • Add id(“xxx”) as an allowable location

path

  • Clarify CDATA handling
  • Will be discussed on the mailing list
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SLIDE 4

Conclusions

  • Proof-of-concept implementation will be

available in Sourceforge (libxmlpatch)

– LGPL license – built on top of libxml2 library – ~500 lines of C code – CDATA not yet handled correctly; index

numbers may be wrong or CDATA content format may change

  • Ready for a WG item?