Basic Concepts Architecture Topology Protocols

Basic Concepts Open e-Print Archive Open Archive -- generalization of e-print Data Provider and Service Provider Partition Record Document Metadata Identifiers

E-Print Archive Author self-archiving –Submission mechanism –Long-term storage system; to –facilitate the broad dissemination of archive data Managed: Preservation/retention policies Mechanism to enables third parties to collect data from the archive. Supports: –discovery, –presentation, –and analysis, of data in the archive. end-user services

Open Archive generalization of e-Print scholarly archives harvesting in a “digital library context”

Data Provider and Service Provider Data Provider –The manager of an archive, acting on behalf of the authors submitting documents. Provides a submission mechanism, long-term storage, and enables third parties to collect data. Service provider –Creates end-user services based on data stored in e- print archives. For example a service provider could implement a search engine for mathematical e-prints stored in archives worldwide.

Data Provider Service Provider

Data Provider Service Provider

Partitions and Records Partition -- Z39.50: database Record – Dienst: a record is either Document metadata, or metadata together with the document –OAI: Document Metadata

Metadata Set Title Date of accession Display ID Full Id Author Abstract Subject Comment Date for Discovery

Basic Concepts Open e-Print Archive Open Archive -- generalization of e-print Data Provider and Service Provider Partition Record Document Metadata Identifiers

Unique identifier assigned to each archive Unique persistent identifiers for records in the archive So archive identifier + record identifier = full identifier

Protocols Dienst OAI Z39.50?

Dienst Verbs (OAI) List Partitions List Contents (partition, after-date, metadata format) Disseminate Metadata for a Record (id, metadata format, content type) Get Metadata Formats List Metadata Formats available for a Record

Dienst Verbs (additional) Disseminate (Z39.50: retrieve) –Content type (Z39.50: record syntax) –view (Z39.50: Element specification) div page image binder encoding List Encodings List Verbs List Document Versions Submit a New Version of a Document

Dienst Verbs (additional) Get Document Structure Submit a Document Get Submit Formats Get Terms and Conditions Withdraw a Document List Indexes Regions/Collections/Publishers

Dienst Mapping Request messages encoded in URLs, embedded in HTTP requests. Responses are structured streams with MIME type text/xml. Status codes and error returns correspond HTTP. Normal response signaled with the 200 reply code. Error returns are signaled with the appropriate 4xx code (400, 404).

OA Protocol List Records List Identifiers List Sets List Metadata Formats Get Record Identify (Explain)

request Partial list of identifiers + resumptionToken