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