Mais conteúdo relacionado
Semelhante a Nitf 2010-11 (20)
Mais de Stuart Myles (20)
Nitf 2010-11
- 2. NITF
© 2010 IPTC (www.iptc.org) All rights reserved 2
• News Industry Text Format
• “A solution for sharing news”
• Developed by News Publishers, for News
Publishers
• Defines the content and structure of news articles
• Currently, NITF v3.5 in DTD and XSD
http://www.nitf.org
http://groups.yahoo.com/group/nitf/
- 3. Towards NITF 4.0
© 2010 IPTC (www.iptc.org) All rights reserved 3
• Open up the schema
– To give NITF users greater flexibility and control
– Align NITF with other standards
• The original NITF 4.0 road map:
– XSD documentation <- Progress to report
– Namespaces <- Progress to report
– RDFization <- Now part of a broader IPTC initiative
– G2ization <- No progress
• NITF 4.0 started Spring 2010, target end of 2010
- 4. XSD Documentation
• Currently, only the NITF 3.5 DTD has documentation
• An “experimental” NITF XSD with documentation
mechanically copied over:
http://groups.yahoo.com/group/nitf/files/schema/nitf-3-5.xsd
• Comments requested, none received…
http://groups.yahoo.com/group/nitf/message/772
© 2010 IPTC (www.iptc.org) All rights reserved 4
- 5. NITF + Foreign Namespace
e.g. Adding Geo Information
© 2010 IPTC (www.iptc.org) All rights reserved 5
• Maps are popular ways to display news
• It would be handy to be able to use GEORSS to add
latitude and longitude information into an NITF article
• Unfortunately, NITF doesn’t allow “foreign namespaces”
- 6. Foreign Namespaces
• A long-standing criticism of NITF is that it is closed to
foreign namespaces
e.g. http://snee.com/xml/xml2005/industryschemas.html#d50e406
• NITF 3.5 added more complete support for foreign
namespaces in enriched text – but not yet elsewhere
• We decided to turn NITF 4.0 into a more open schema
• An experimental XSD can be found at
http://groups.yahoo.com/group/nitf/files/schema/
http://www.iptc.org/std-dev/NITF/4.0/
© 2010 IPTC (www.iptc.org) All rights reserved 6
- 7. Experimenting with Namespaces
I constructed some NITF instance documents
to help figure out where to add namespaces
into NITF 4.0
© 2010 IPTC (www.iptc.org) All rights reserved 7
- 8. Testing is Important!
• The NITF 3.5 XSD foreign namespace support didn’t
work as expected
• I wanted to be able to add some XHTML but couldn’t at
first
• I had to change the processContents style to “lax”
© 2010 IPTC (www.iptc.org) All rights reserved 8
- 9. NITF <head>
• Within the <head> it makes sense to add expansion
slots within <docdata> and at the end of <head>
• Everywhere else is already generic (iim, pubdata) or too
specific
© 2010 IPTC (www.iptc.org) All rights reserved 9
- 10. NITF <body>
• Added namespaces to <body.head>…
© 2010 IPTC (www.iptc.org) All rights reserved 10
- 11. NITF <body>
• … and within <media> …
© 2010 IPTC (www.iptc.org) All rights reserved 11
- 12. NITF <body>
• … and within <block>.
• I experimented with namespaces outside of “containers”
in the <body> but triggered XSD errors.
• Also, what would this “mean”?
© 2010 IPTC (www.iptc.org) All rights reserved 12
- 13. After NITF <body>?
• I allowed foreign namespaces after the body
• This would turn NITF into a “envelope” language
• Other languages (ATOM, NewsML-G2) sport this model
– Could be useful as a general-purpose expansion
– Perhaps as a way to carry additional metadata such as codes
© 2010 IPTC (www.iptc.org) All rights reserved 13
- 14. NITF Attributes
• I added foreign namespace
attributes to the
commonNITFAttributes group
• Used in many – but far from all -
NITF elements
© 2010 IPTC (www.iptc.org) All rights reserved 14
• Adding foreign namespace
attributes to the
globalNITFAttributes group would
cover the rest of the NITF
elements
- 15. NITF and IPTC’s G2
• G2 is a unified framework for packaging and exchanging
news content
• Standard model for news metadata regardless of the
content or media type
• However, NITF predates the G2 framework
• With work, NITF can join the G2 family, just like SportsML
• The biggest change will be the inline adoption of QCodes
– Colon separated scheme:code syntax for controlled vocabularies
• Proposal: proceed with NITF 4.0 without G2 support, to
avoid delay – G2 support is too big to rush
© 2010 IPTC (www.iptc.org) All rights reserved 15
- 16. NITF 4.0
• The experimental NITF 4.0 schema and a couple of
example documents were distributed to the NITF Yahoo!
email list for comment and are available at
http://www.iptc.org/std-dev/NITF/4.0/
• After the deadline for submitting documents to this
meeting, I got a little feedback, asking for additions
– What is the formal procedure? Can we vote and make changes?
• NITF v 3.4 started the move to XML Schema in 2007
• Adding documentation and opening up to “foreign
namespaces” completes the transition to XML Schema
© 2010 IPTC (www.iptc.org) All rights reserved 16
