Review XML: What is it

1
ReviewXML What is it?

• XML eXtensible Markup Language
• Defined by the W3C (World Wide Web Consortium)
• Exchange of Information
• Loose integration of Applications
• provides a format for describing structured data
• Supported by Microsofts Internet Explorer and
  Office 2000
• Lots of tools for support (many free, from IBM,
  Oracle, Sun, etc.)

2
Learning the Alphabet
XQL
SGML
XML
DTD
HTML
XSL
3
XML Style SheetsXSL What it is...

• transformation mechanism for XML documents e.g.
  HTML.
• allows the separation of content from
  presentation
• Can be generated programmatically

4
LAS

• STRT.M 635.0000 START DEPTH
• STOP.M 400.0000 STOP DEPTH
• STEP.M -0.125 STEP

XML

• ltprimaryIndexgtDepthlt/primaryIndexgt
• ltstartIndexgt635.0000lt/startIndexgt
• ltendIndexgt400.0000lt/endIndexgt
• ltstepIncrementgt-0.125lt/stepIncrementgt
• ltindexUnitsgtmetreslt/indexUnitsgt
• ltuomNamingSystem typePOSC/gt

5
New Stuff...

• Developed WellLogML
• Meetings with LAS representative
• Meetings with suppliers
• Sample implementation
• Demos at SPWLA and SPE (scheduled)

6
Sample Implementation

• Not just a paper standard
• Implemented in commercial software
• Legacy formats (DLIS, LIS, LAS) easily converted
  to/from WellLogML
• Visualization easily handled with current tools
  applications available

7
WellLogML

• Paper (specification) written
• available from POSC web site
  http//www.posc.org/ebiz
• seeking comments
• Developed DTD
• available at http//www.posc.org/dtds

8
Benefits of WellLogML

• Support for array curves
• Support for array parameters
• Parameter data from multiple runs
• Support for indexes other than depth
• Support for evenly and unevenly spaced curves
• Easily understood by people
• Easily read by computers
• No industry specific certification program
  required
• No industry specific reformatting program
  required
• Easily loaded into common application programs
• Easily formatted for display
• Bill Gates would like it