ADLAlexandria digital Library – Davidson Library, UCSB
Alexandria Digital Library (ADL)
Brief intro to ADLItem vs Collection Level Metadata
Collection Level MetadataWhat is it?What does it allow us to do?Why is it important for the
IndividualDL softwareCollection discovery service
ADLAlexandria digital Library – Davidson Library, UCSB
Intro to ADL - Mission
To provide a distributed spatially searchable digital library of geographically referenced materials.
The library's components may be distributed (spread across the Internet) or coexist within a single network or desktop.
ADLAlexandria digital Library – Davidson Library, UCSB
Facilitate spatial searching for a variety of information
Botanical Survey
Archeological Digs
Geographical Data Archives
Museum Artifacts
Art about …
Zoological Habitat Study
Books about …
Earth Science Data
ADLAlexandria digital Library – Davidson Library, UCSB
Intro to ADL
Provides quick and accurate answers to the question "What data is available for this geographic area?“
Provides both, online spatial content and metadata of library holdings for local and distributed collections.
Internet discovery, access and delivery.
ADLAlexandria digital Library – Davidson Library, UCSB
ADL Item Level Metadata
Subject-related textTitleAssigned term
OriginatorGeographic locationCoverage dateObject typeFormatIdentifier
ADLAlexandria digital Library – Davidson Library, UCSB
ADL “Webclient” Interface (2002)
ADLAlexandria digital Library – Davidson Library, UCSB
What is Collection Level Metadata?
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
ADL CLM provides information about collections…consistent and uniformdescriptive and statistical
…allows individuals and software to rapidlyidentify relevant collectionssearch across collections
ADLAlexandria digital Library – Davidson Library, UCSB
What is Collection Level Metadata?
Collection-level metadata describes
buckets (search fields)supported by collection
item-level metadata mappings
statistical overviews
item counts
spatial and temporal coverage histograms
ADLAlexandria digital Library – Davidson Library, UCSB
What is Collection Level Metadata?
Focuses on the aggregated information about collections and description of collection services
Includeshuman readable contentspatial and temporal extent informationsearch methodology information for use by the computer
Facilitates rapid search across different archives in a consistent manner
Thus, extremely important to cross collection searching and collection discovery
ADLAlexandria digital Library – Davidson Library, UCSB
What is Collection Level Metadata?Contextual
IdentityScope and PurposeOriginator, Creator
InherentStatistics
Overall countsCounts by TypeCounts by FormatSpatial CoverageTemporal Coverage
Search method supported (e.g. ADL search bucketsHarvest methods supported (e.g. NSDL/OAI)
ADLAlexandria digital Library – Davidson Library, UCSB
ADLAlexandria digital Library – Davidson Library, UCSB
ADLAlexandria digital Library – Davidson Library, UCSB
ADLAlexandria digital Library – Davidson Library, UCSB
ADL Collection-level metadata
ADLAlexandria digital Library – Davidson Library, UCSB
ADL CLM – Compare spatial coverage
ADLAlexandria digital Library – Davidson Library, UCSB
ADL CLM– Compare temporal coverage
ADLAlexandria digital Library – Davidson Library, UCSB
What does CLM do?
Informs user about collections
FacilitatesRapid user search across collectionsRapid software search across collections***Collection Discovery***
ADLAlexandria digital Library – Davidson Library, UCSB
ADL – New collection discovery service
Poll known library servers
Eliminate non-relevant collections
Collect contextual and inherent information
Inform the software of the available search “buckets” for specific collections
Inform the software of harvest methodology for specific collections (NSDL/OAI)
ADLAlexandria digital Library – Davidson Library, UCSB
Collection discovery service will allow cross-archive searching
ADLAlexandria digital Library – Davidson Library, UCSB
CLM is important because…
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
Collections will have:Common description
Readable by humans
Usable by library services
ADLAlexandria digital Library – Davidson Library, UCSB
CLM is important because…
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
Facilitate rapid and consistent
Cross-collection searching
Cross-archive searching
ADLAlexandria digital Library – Davidson Library, UCSB
CLM is important because…
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
Provides descriptive summary information about collection
Provides aggregated information about the holdings
User (and software) can determine how applicable the contents of a collection are to a project
ADLAlexandria digital Library – Davidson Library, UCSB
CLM is important because…
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
Users (and software) can rapidly eliminate collections that do not have appropriate information and route searches to relevant collections
ADLAlexandria digital Library – Davidson Library, UCSB
CLM is important because…
Thus, It is Important to Users!
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
CLM is the missing piece of the puzzle!
Facilitates:
human cross-collection searching
automated cross-collection searching
collection discovery across multiple digital libraries
ADLAlexandria digital Library – Davidson Library, UCSB
ADL Collection-level metadata
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083
The beginning…
ADLAlexandria digital Library – Davidson Library, UCSB
Alexandria Digital Library http://webclient.alexandria.ucsb.edu/http://www.alexandria.ucsb.edu/middleware/
ADLAlexandria digital Library – Davidson Library, UCSB
ADL Collection Level MetadataContextual
IdentityScope and PurposeOriginator, Creator
InherentStatistics
Overall countsCounts by TypeCounts by Format
Spatial CoverageTemporal CoverageSearch fields supportedHarvest methods supported (e.g. NSDL/OAI)
The beginning…
Object Typecartographic works mapsimages photographs aerial photographs • • •
Count324,876324,876
2,014,799484,083484,083