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![Machine Tag Syntax There is no one standard syntax. Different systems may have variations of the original syntax proposed by Flickr. [namespace] : [predicate] = [object] Subject Predicate (Property) Object (Value) Where is the “Subject” in the syntax?](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/85/Machine-Tags-10-320.jpg)
![Machine Tag example Resource Predicate Object Johnny Smith Photo-1923 foo:takenBy [namespace] : [predicate] = [object] foo : takenBy = “Johnny Smith”](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/85/Machine-Tags-11-320.jpg)
![Describing location information Subject Predicate Object Photo-1923 geo:locality Piccadilly Square [namespace] : [predicate] = [object] geo:locality=“piccadilly square”](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/85/Machine-Tags-12-320.jpg)
![BookmarkManager BookmarkManager GeonamesTagListener ForUserListener geonames:[location] for:[username] bookmark added updated deleted notify notify](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/85/Machine-Tags-25-320.jpg)
![GeonamesTagListener.java Find all “machine tags” of gn:geonames=[location] Get the latitude and longitude pair for [location] from Geonames.org. Add POINT(lng,lat) about a bookmark to the DB.](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/85/Machine-Tags-26-320.jpg)
![Machine Tag Syntax There is no one standard syntax. Different systems may have variations of the original syntax proposed by Flickr. [namespace] : [predicate] = [object] Subject Predicate (Property) Object (Value) Where is the “Subject” in the syntax?](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/75/Machine-Tags-10-2048.jpg)
![Machine Tag example Resource Predicate Object Johnny Smith Photo-1923 foo:takenBy [namespace] : [predicate] = [object] foo : takenBy = “Johnny Smith”](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/75/Machine-Tags-11-2048.jpg)
![Describing location information Subject Predicate Object Photo-1923 geo:locality Piccadilly Square [namespace] : [predicate] = [object] geo:locality=“piccadilly square”](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/75/Machine-Tags-12-2048.jpg)
![BookmarkManager BookmarkManager GeonamesTagListener ForUserListener geonames:[location] for:[username] bookmark added updated deleted notify notify](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/75/Machine-Tags-25-2048.jpg)
![GeonamesTagListener.java Find all “machine tags” of gn:geonames=[location] Get the latitude and longitude pair for [location] from Geonames.org. Add POINT(lng,lat) about a bookmark to the DB.](https://image.slidesharecdn.com/machine-tags-1204488095118577-2/75/Machine-Tags-26-2048.jpg)
![$tag[$tags] = $tags;](https://cdn.slidesharecdn.com/ss_thumbnails/visualwebmeetup-090721212756-phpapp01-thumbnail.jpg?width=600ounds&width=560&fit=bounds)
Machine Tags
- 1. Machine Tags Dr.Harry Chen CMSC 491S/691S February 27, 2008
- 2. Agenda What’s MachineTags Different ways to use Machine Tags Deficiency of Machine Tags Machine Tags implementation in gnizr
- 3. Traditional tags Thisis how your “grandfather” uses tags
- 4. Tags are usedfor labeling
- 5. Tagging Model Rememberthis diagram from our previous discussion? User Resources Tags
- 6. What else canyou say about “photo-1293”? Resources Relates to a YouTube video (link?) John Smith is in this picture (homepage?) Taken on 2007/12/03 @ 10:00PM Johnny is the photographer (homepage?) Relates to a family trip (trip’s homepage?) Location Piccadilly Square (latitude/longitude?)
- 7. Describing and relatingresources The amount of user-generated content is growing on the Web (flickr, youtube, last.fm, upcoming, etc.). New problem How to describe “ad-hoc” properties about the resources that we have created How to relate multiple resources that we have created across multiple Web sites What’s an “ad-hoc” property?
- 8. Machine Tags Tagswith a special syntax that allow users to describe “ad-hoc” properties and relate distinctive resources across multiple Web sites. + = http://www.flickr.com/groups/api/discuss/72157594497877875/
- 9. Triple Model MachineTag syntax is based on the Triple model, similar to which of the RDF language. Subject Predicate (Property) Object (Value) Johnny Photo-1923 takenBy
- 10. Machine Tag SyntaxThere is no one standard syntax. Different systems may have variations of the original syntax proposed by Flickr. [namespace] : [predicate] = [object] Subject Predicate (Property) Object (Value) Where is the “Subject” in the syntax?
- 11. Machine Tag exampleResource Predicate Object Johnny Smith Photo-1923 foo:takenBy [namespace] : [predicate] = [object] foo : takenBy = “Johnny Smith”
- 12. Describing location informationSubject Predicate Object Photo-1923 geo:locality Piccadilly Square [namespace] : [predicate] = [object] geo:locality=“piccadilly square”
- 13. Relating resources Whatif I want to say “photo-1923” relates to “event-1393” on upcoming.yahoo.com… Subject Predicate Object Photo-1923 upcoming:event http://upcoming.yahoo.com/event/1393 upcoming:event=1393
- 14. I machine-tagged, butwhat use? Machine Tags can be used for Geotagging: putting your photos on a map Field-based search: search with prefix URL shortcuts: include image and video in your blogs without much HTML editing Semantic Web experiments: describe properties that link to RDF or OWL documents … What’s your experience with Machine Tags?
- 15. Interesting use ofMachine Tags What camera did u use? About the airplane
- 16. Machine Tags forselling books http://adactio.com/journal/1274/ amazon:asin=1234567890 book:isbn=1234567890 http://learningtheworld.eu/2007/amazon-machine-tags/
- 17. Relating Flickr photoswith a blog post http://adactio.com/journal/1274/ Collective intelligence?
- 18. Machine Tag forfield-based search There are overlaps between the Machine Tag syntax and field-based search. Benefit : learn one syntax and use it in two different ways
- 19. Machine Tag forbuilding taxonomy? Google Code allows administrator to define “Issue Labels”.
- 20. Relating resources toRDF/OWL Geonames.ORG http://sws.geonames.org/5352844/about.rdf geonames:feature=5352844 http://www.geospatialsemanticweb.com/2007/03/28/geonames-machine-tags
- 21. Shortcomings of theMachine Tags Lack of control vocabulary Who says you should or should not use what tags? Do you use “geonames:feature” or “gn:f=” Difficult to express “object” of a complex value geo:lat/lng=23.00,39.23 (ugly, parser is need) geo:lat=23.00, geo:lng=39.23 (okay) What if I want to express multiple coordinates: geo:lat=23,00, geo:lng=39.23, geo:lat=33.00, geo:lng=-30.00, ... (How do I interpret the key/value pairs?) Difficult to describe certain semantic information we will see an example.
- 22. Where is yourkid? Tagged: - person=john person=mary person=david landmark=power_station Who is John? Power Station?
- 23. Machine Tags inGnizr How “tags” are stored What does gnizr do when a “machine tag” is detected How to add new implementation to process new types of “machine tag”
- 24. DB Table: “tag”id tag count
- 25. BookmarkManager BookmarkManager GeonamesTagListenerForUserListener geonames:[location] for:[username] bookmark added updated deleted notify notify
- 26. GeonamesTagListener.java Find all“machine tags” of gn:geonames=[location] Get the latitude and longitude pair for [location] from Geonames.org. Add POINT(lng,lat) about a bookmark to the DB.
- 27. Listen for newMachine Tags Extend from BookmarkListener Add new listeners to the BookmarkManager
- 28. Summary Machine Tagsare tags with a special syntax that allow users to describe “ad-hoc” properties and relate distinctive resources across multiple Web sites. Use in geotagging, field-based search, foring URL shortcuts and experimenting with Semantic Web technology Machine Tags have certain shortcomings in expressing rich semantic information.