OAI-OREPresentation OverviewOAI –Open Archive InitiativeOpen Archives Initiative-Object Reuse and Exchange (OAI-ORE)TermsExamples of Aggregations:Aggregation and Aggregated resourcesSlide 8The ORE ModelReM GraphReM-AggregationRepresenting MetadataAggregated ResourcesSharing of Aggregated ResourcesSerialization FormatsSlide 16Building a ReMBuilding a ReM…Slide 19Slide 20Slide 21Common Scenarios for AggregationsResource Map DiscoveryResource Map Discovery(A) Batch Discoveryi)ReMs in OAI-PMHii) ReMs in SiteMapsiii) ReMs in Syndication Feeds (Atom)iii) ReMs in Syndication Feeds (RSS 2.0)(B) Resource EmbeddingKnowledge Levelsi) HTML Link Element (Full Knowledge)ii) HTML Link Element (Indirect Knowledge)ii) Showing ReMs in HTML pages(C) Response EmbeddingReferences01/14/19 CS 791/891 "Web Syndication Formats"1OAI-ORE Venkata Krishna Potta and Ketan Reddy PeddabachiInstructor: Dr. Michael Nelson01/14/19CS 791/891 "Web Syndication Formats"2Presentation OverviewIntroductionThe ORE ModelResource Map Implementation in AtomReM DemoDiscovery of ReM’sConclusion01/14/19CS 791/891 "Web Syndication Formats"3OAI –Open Archive InitiativeInitially OAI started with an effort to enhance access to e-print archives as a means of increasing the availability of scholarly communication Now opening up access to a range of digital materials.Major Projects: OAI-ORE and OAI-PMH01/14/19CS 791/891 "Web Syndication Formats"4Open Archives Initiative-Object Reuse and Exchange (OAI-ORE)OAI-ORE defines standards for the description and exchange of aggregations of Web resources. ReferenceORE will develop specifications that allow distributed repositories to exchange information about their constituent digital objects.will include approaches for representing digital objects and repository services that facilitate access and ingest of these representations. will enable a new generation of cross-repository services that leverage the intrinsic value of digital objects beyond the borders of hosting repositories.01/14/19CS 791/891 "Web Syndication Formats"5TermsResources - refers to any item of interest found on the web.Aggregation- a collection of related resources.Aggregated Resource- resource which is part of an aggregation01/14/19CS 791/891 "Web Syndication Formats"6Examples of Aggregations:A collection of favorite images from various Web sites.My ImagesA blog consisting of related images and videos.cnn blogA multi-page, HTML document where the pages are linked together by hyperlinks that provide "previous page" and "next page" access. HTML PagesInformation available from "social networking" sites, such as flickr, YouTube, and myspace. Photos01/14/19CS 791/891 "Web Syndication Formats"7Aggregation and Aggregated resourcesThe Web :Reference01/14/19CS 791/891 "Web Syndication Formats"8Aggregation and Aggregated resourcesAggregationResourceReMAggregated ResourceReference01/14/19CS 791/891 "Web Syndication Formats"9The ORE ModelResource Map (ReM) A Resource that specifies a URI for an Aggregation Enumerates the constituents of AggregationDescribes the relationships among themIdentification of a Resource Map (URI-R)Identification of an Aggregation (URI-A)fragment identifier dereference of URI-R. Example: the URI-R http://sample.org/ReM-1 Aggregation with URI-A http://sample.org/ReM-1#aggregation.01/14/19CS 791/891 "Web Syndication Formats"10ReM GraphReference01/14/19CS 791/891 "Web Syndication Formats"11 ReM-AggregationReference01/14/19CS 791/891 "Web Syndication Formats"12Representing Metadata Reference01/14/19CS 791/891 "Web Syndication Formats"13Aggregated Resources Reference01/14/19CS 791/891 "Web Syndication Formats"14Sharing of Aggregated ResourcesReference01/14/19CS 791/891 "Web Syndication Formats"15Serialization FormatsThe ORE Model can be implemented many serialization formats, 2 of them being:AtomRDF/XML01/14/19CS 791/891 "Web Syndication Formats"16 Resource Map Implementation in Atom01/14/19CS 791/891 "Web Syndication Formats"17Building a ReMarXiv eprint example: http://arxiv.org/abs/astro-ph/0601007 Hypothetical ReM http://arxiv.org/rem/astro-ph/0601007 3 Aggregated Resources http://arxiv.org/ps/astro-ph/0601007http://arxiv.org/pdf/astro-ph/0601007http://arxiv.org/e-print/astro-ph/060100701/14/19CS 791/891 "Web Syndication Formats"18Building a ReM…<?xml version="1.0" encoding="utf-8"?> <feed xmlns="http://www.w3.org/2005/Atom"> <id>tag:arxiv.org,2007:astro-ph/0601007v2</id> <category scheme="http://www.openarchives.org/ore/terms/" term="http://www.openarchives.org/ore/terms/ResourceMap" label="Resource Map" /> <link rel="describes" href="http://arxiv.org/rem/astro-ph/0601007#aggregation" /> <entry> <id>tag:arxiv.org,2007:astro-ph/0601007v2:pdf</id> </entry> <entry> <id>tag:arxiv.org,2007:astro-ph/0601007v2:ps</id> </entry> <entry> <id>tag:arxiv.org,2007:astro-ph/0601007v2:e-print</id> </entry> </feed>01/14/19CS 791/891 "Web Syndication Formats"19Building a ReM…<?xml version="1.0" encoding="utf-8"?> <feed xmlns="http://www.w3.org/2005/Atom"> <id>tag:arxiv.org,2007:astro-ph/0601007v2</id> <link href="http://arxiv.org/rem/astro-ph/0601007" rel="self" type="application/atom+xml"/> <category scheme="http://www.openarchives.org/ore/terms/" term="http://www.openarchives.org/ore/terms/ResourceMap" label="Resource Map" /> <link rel="describes" href="http://arxiv.org/rem/astro-ph/0601007#aggregation" /> <entry> <id>tag:arxiv.org,2007:astro-ph/0601007v2:ps</id> <link href="http://arxiv.org/ps/astro-ph/0601007" rel="alternate" type="application/postscript"/> </entry> ….….</feed>01/14/19CS 791/891 "Web Syndication Formats"20Building a ReM… More Elements:/feed/title/feed/entry/title/feed/authorhttp://www.openarchives.org/ore/0.2/atom-implementation#title01/14/19CS 791/891 "Web Syndication Formats"21Building a ReM…/feed/updated and /feed/entry/updatedhttp://www.openarchives.org/ore/0.2/atom-implementation#updated01/14/19CS 791/891 "Web Syndication Formats"22Common Scenarios for Aggregations Multiple FormatsMirror CopiesVersionsSplash Pages01/14/19CS 791/891 "Web Syndication Formats"23Resource Map Discovery01/14/19CS 791/891 "Web Syndication Formats"24Resource Map DiscoveryCrawlers or harvesters must discover Resource Maps (ReMs). Different discovery mechanisms :(A) Batch Discovery,(B) Resource Embedding & (C) Response Embedding01/14/19CS