Fedora Atom

1
Fedora Atom

• Edwin Shin
• Fedora Commons
• http//www.fedora-commons.org/

2
Acknowledgements

• University of London
• MediaShelf

3
Serialization vs. Protocol

• Syndication Format
• RFC4287
• XML-based document format
• e.g. BBC headlines

• Publishing Protocol
• RFC5023
• HTTP-based, RESTful publishing protocol
• e.g. GData

4
Why Atom?

• Simple, but flexible extensible
• Widespread adoption
• From news blogs to OAI-ORE
• Tool support
• Libraries for Java, Ruby, .NET, etc.
• Feed readers
• lightweight recipe for enabling
  interoperability

5
Fedora Atom Serialization

• Alternative serialization to FOXML METS
• Atom ORE serialization
• ZARCHIVE Context
• A ZIP archive of a Fedora object, with an Atom
  manifest
• Messaging Format

6
Atom

• ltfeedgt
• ltidgtinfofedora/demoSmileyBeerGlasslt/idgt
• ltentrygt
• ltidgtinfofedora/demoSmileyBeerGlass/FULL_SIZE
  lt/idgt
• lttitle type"text"gtFULL_SIZElt/titlegt
• ltupdatedgt2008-04-03T104721.162Zlt/updatedgt
• ltlink href"infofedora/demoSmileyBeerGlass/F
  ULL_SIZE/2008-04-03T104721.162Z"
  rel"alternate"/gt
• ltcategory term"E" scheme"infofedora/fedora-
  systemdef/modelcontrolGroup"/gt
• lt/entrygt
• ltentry xmlnsthr"http//purl.org/syndication/th
  read/1.0"gt
• ltidgtinfofedora/demoSmileyBeerGlass/FULL_SIZE
  /2008-04-03T104721.162Zlt/idgt
• lttitle type"text"gtFullSize.jpg.0lt/titlegt
• ltupdatedgt2008-04-03T104721.162Zlt/updatedgt
• ltthrin-reply-to ref"infofedora/demoSmileyB
  eerGlass/FULL_SIZE"/gt
• ltsummary type"text"gtFullSize.jpg.0lt/summarygt
• ltcontent type"image/jpeg" src"http//.../Smi
  leyBeerGlass-FullSize.jpg"/gt
• lt/entrygt
• lt/feedgt

7
OREAtom

• ltfeedgt
• ltidgtinfofedora/demoSmileyBeerGlasslt/idgt
• ltlink href"http//localhost8080/fedora/get/dem
  oSmileyBeerGlass" rel"self" type"application/at
  omxml"/gt
• lttitle type"text"gtResource Map
  http//localhost8080/fedora/get/demoSmileyBeerGl
  asslt/titlegt
• ltauthorgtltnamegtFedora Repository
  Servicelt/namegtlt/authorgt
• ltlink href"http//localhost8080/fedora/get/dem
  oSmileyBeerGlassaggregation" rel"describes"/gt
• ltcategory term"http//www.openarchives.org/ore/
  terms/ResourceMap" scheme"http//www.openarchives
  .org/ore/terms/" label"ResourceMap"/gt
• ltfedora-modelhasContentModelgtinfofedora/demoC
  modelForBMech_DualResImageImpllt/fedora-modelhasCo
  ntentModelgt
• ltdctitlegtSmiley Beer Glasslt/dctitlegt
• ltrelisMemberOfgtinfofedora/demoSmileyStufflt/re
  lisMemberOfgt
• ltentrygt
• ltidgtinfofedora/demoSmileyBeerGlass/FULL_SIZE
  lt/idgt
• ltupdatedgt2008-04-03T103923.473Zlt/updatedgt
• lttitle type"text"gtAggregated Resource
  http//localhost8080/fedora/get/demoSmileyBeerGl
  ass/FULL_SIZElt/titlegt
• ltlink href"http//localhost8080/fedora/get/d
  emoSmileyBeerGlass/FULL_SIZE" rel"alternate"/gt
• ltfedora-modelversionablegttruelt/fedora-modelv
  ersionablegt
• lt/entrygt
• ltentrygt
• ltidgtinfofedora/demoSmileyBeerGlass/MEDIUM_SI
  ZElt/idgt

8
Zip Archive Context

• ltfeedgt
• ltentrygt
• ltidgtinfofedora/demoSmileyBeerGlass/TEST/2008
  -04-03T111940.440Zlt/idgt
• lttitle type"text"gtTEST.0lt/titlegt
• ltupdatedgt2008-04-03T111940.440Zlt/updatedgt
• ltthrin-reply-to ref"infofedora/demoSmileyB
  eerGlass/TEST"/gt
• ltcategory term"Managed Image"
  scheme"infofedora/fedora-systemdef/modellabel"
  /gt
• ltsummary type"text"gtTEST.0lt/summarygt
• ltcontent type"image/jpeg" src"TEST.0.jpg"/gt
• lt/entrygt
• lt/feedgt

9
API-M Messaging Format

• ltentrygt
• ltidgturnuuid8bcefc04-8391-4bf9-b0e7-d4822b829de
  blt/idgt
• ltupdatedgt2008-04-02T173251.122Zlt/updatedgt
• ltauthorgt
• ltnamegtfedoraAdminlt/namegt
• lturigthttp//localhost8080/fedoralt/urigt
• lt/authorgt
• lttitle type"text"gtpurgeObjectlt/titlegt
• ltcategory
• scheme"http//www.fedora.info/definitions/1/0
  /types/pid"
• term"demofoo"
• label"xsdstring"/gt
• ltsummarygtdemofoolt/summarygt
• ltcontent type"text"gt2008-04-01T010203.001Zlt/c
  ontentgt
• lt/entrygt

10
Deserialization

• Atom as an ingest format
• Fedora objects
• ORE Resource Maps
• Any Atom feed
• Remote invocation

11

• Currently available in Subversion
• https//fedora-commons.svn.sourceforge.net/svnroot
  /fedora-commons/fedora/branches/dev-146791

12
Future exploration

• Modeling atomistic objects
• Atom Publishing Protocol
• Implement over the REST-API
• SWORD