The document discusses the complexities of creating a playlist and managing music data through various APIs, emphasizing the importance of storytelling and shared understanding in data representation. It highlights challenges with APIs, such as excessive results and data format inconsistencies, and introduces the semantic web as a solution for precise queries. Additionally, it touches on lessons learned from using Drupal, suggesting improvements for performance and efficiency.

1. THE MASHED UP PLAYLIST part IIDavid Peterson @davidseth #w3chttp://www.flickr.com/photos/soyignatius/

2. David Peterson@davidseth

3. ChallengeCreate a snapshot of an artist

4. Problem <xml> <track> <title>Purple Rain</title> <artistName>Prince</artistName> </track></xml>

5. Into

6. It’s all about story telling

7. Shared UnderstandingCan’t tell a story if the other person doesn’t get what we meanOr even speak the same languageImagine explain what a kiwi wasor what a sheep was

8. The story matters... but ...You never really have all the information you need, whether big or small

9. You Just don’t Always KnowSomeone else knows more than youHow to find it?

10. One Exception

11. Semantic WebCore idea you never really know the entire pictureThis is a good thingFreedom

12. Open WorldClosed Worldhttp://www.flickr.com/photos/almasryalyoum_e/

13. Finding a SolutionWhich APIs to useWhich APIs can we useHow can we combine data from multiple sourcesHow can we automate it

14. The Curse of too muchThere are over 50 APIs listed on programmableweb.comToo many to look intoEach has its own API methods and return data formats JSON, XML, RSS, RDF !!!

15. Take your Pick APIs everywhereBBC MusicDiscogsLast.fmMusicBrainzYahoo MusicFlickrYoutubeThe Hype Machine

16. Finding the keyOne common feature was the usage of a MusicBrainz IDLast.fmDiscogsFreebaseWikipedia/DbpediaBBC

17. Eureka!Great, now all I had to do was use the MusicBrainz API to look up the ID and I was done. Easy...:( The search API sucked. It returned too many fuzzy resultscrap

18. Back to the futureThis is where the Semantic Web enters the pictureAll that stuff about story tellingShared understandingURIs (web links)

19. SPARQLThink of it as Google with a WHERE clause

20. SELECT ?artist WHERE {?artist foaf:name"Prince"@en .?artist a <http://dbpedia.org/ontology/MusicalArtist>.}

21. SELECT ?artist ?bio ?url?album WHERE {?artist foaf:name"Prince"@en .?artist a <http://dbpedia.org/ontology/MusicalArtist> .?artist dbpedia2:abstract ?bio .?artist foaf:page?url. OPTIONAL {?album <http://dbpedia.org/ontology/artist> ?artist .?album rdfs:label"Purple Rain"@en . }}LIMIT 1

22. Pinpoint resultsThis returns ONE result“exactly” what we are looking for (or nothing!)

23. {170d193a-845c-479f-980e-bef15710653e}http://www.flickr.com/photos/riseofphoenix/

24. {070d193a-845c-479f-980e-bef15710653e}http://www.flickr.com/photos/angeldew/

25. Raw DataNot too pretty to look atBut computers LOVE this stuff

26. So, what do we getDisambiguationMusicBrainz IDDiscographyRelated ArtistsOfficial homepageBioCredit card details (in Semantic Web 2.0)

27. The Rosetta StoneMusicBrainz ID is our key to the wild web of APIsWikipedia URL is the key to Semantic WebOne happy familyhttp://www.flickr.com/photos/vportals/

28. [insert LOD graph]

29. Take a look[browser]

30. Hindsight is 20/20... or lessons learned

31. Drupal SucksDrupal performance, what performance?Out of the box it’s been beaten with an ugly stick

32. Don’t use DrupalTo get the best performance out of Drupal, don’t use Drupal

33. PressflowKey patches and enhancementsReleases mirror official Drupal releasesBig players are using itDrupal.orgABCMusic labelsNewspapers

34. Start your EnginesMySQL base install is ... lackingMyISAM == slowUse PerconaXtraDB... or ... InnoDB

35. Reduce your footprintAPCPHP app is compiled & cached in memory

36. SearchDrupal’s built in search can be a dawgSolrMuch faster searchOffers facetingCan become a platform in its own right.

37. A Fresh Coat of PaintVarnishLast but certainly not leastUp to 10 million hits per hour

38. What’s Next?Project MercuryDrupal 7RDFaViews 3FOAF+SSLopen social networkingeverything under your control