Metadata-based Discovery: Experience in Crystallography UKOLN is supported by: Monica Duke UKOLN, University of Bath, UK A centre of.

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Presentation transcript:

Metadata-based Discovery: Experience in Crystallography UKOLN is supported by: Monica Duke UKOLN, University of Bath, UK A centre of expertise in digital information management

Discovery in the curation life-cycle “Digital Curation itself is the active management of data over the life-cycle of scholarly and scientific interest; it is the key to reproducibility and re-use. Metadata for resource discovery and retrieval are important, with mark-up on time/place referencing as well as subject description and linkage to discipline based ontologies providing key research foci.” Chris Rusbridge et al.

Digital Library Infrastructures Historically, cross-search and discovery protocols an area of interest and research Z39.50 perceived to have barriers/limitations OAI-PMH developed using a harvesting model

The OAI-PMH Data providers Service providers Harvesting based on OAI-PMH

The OAI-PMH OAI Protocol for Metadata Harvesting simple protocol for sharing metadata records between applications currently at version 2.0 based on HTTP, XML, XML Schema and XML namespaces allows a harvester to ask a remote repository for some or all of its metadata records  where ‘some’ is based on date-stamps, sets, metadata formats

Metadata in the eBank UK project Simple Dublin Core Intended for resource discovery Compatible with OAI-PMH Qualified to specify ‘vocabularies’ Refinements: aid interpretation of element value E.g. seafood “Dumbing-down” principle applies

Metadata terms Creator Rights Date Type Identifier Specified using XML schema and documented using an Application Profile Subject InChI ChemicalFormula Organic

Information sources for Crystallography Cross-discipline sources  OAIster  DAREnet Discipline-specific  ChemRefer  Chemistry Central  Crystallography Open Database  Reciprocal Net Texts/publications, chemistry general Data, crystallography

The discovery landscape Some within OAI-PMH infrastructure (metadata- based) Variety of (human) search interfaces (simple to advanced) Well established sources  Cambridge Structural Database  Protein Data Bank

OAIster An OAI-PMH aggregator Wide-ranging and inclusive: Any repository, all content types Metadata from 675 institutions Limit by resource type inc. datasets (5 results) Pointers to collections of data records for ‘crystallography’ Results spread across several sources

OAIster

DAREnet Worldwide access to Dutch academic research results Simple search: “crystallography” (40 results) General advanced search (author, year)

DAREnet

ChemRefer Access to full text chemical, pharmaceutical literature Index Simple search interface

ChemRefer

ChemRefer display of results

Chemistry Central No search feature (through Biomed central)

Crystallography Open Database (COD) Promotes open data Allows submission ‘REF’ format also used 40K entries

COD

Reciprocal Net A distributed crystallography network for researchers, students and the general public Search engine Crystallography-specific search interface

Reciprocal Net Search Interface

Dataset result in Reciprocal Net

Joining up the landscape Technical infrastructure differences can be overcome Agreement on common APIs, metadata sets Hide API differences from user Survey in one application area – how similar are other disciplines?

Issues with cross-search Audiences  Who are the user groups?  What are their information needs? Selection  Identifying subsets of interest Human Interface design  Search options  Presentation of heterogenous information