Overview of DLESE Metadata & Catalog System

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Presentation transcript:

Overview of DLESE Metadata & Catalog System April 23, 2002

Materials in DLESE Laboratory Exercises Conceptual Images Pedagogy Tutorials Case Studies/ Virtual Field Trips Student Portfolios Tools (e.g. Calculators) Scientific Papers Professional Opportunities Problem Sets Theme or Portal Sites Courses Lesson Plans/ Syllabi Images, Animations, Video (observed) Large Data Sets History of Geoscience Assessment Tools/ Rubrics Animations, Applets, Models (simulations) Large Data Set Tools

DLESE-IMS Metadata Framework Loosely based on IMS Uses an XML DTD; no data-typing Describes: REQUIRED: title, creator, cataloger, description, resource type, technical info., audience, copyright, cost, URL, topic OPTIONAL: geospatial, keywords, science & geography standards, relationships No vocabulary enforcement XML standard is shifting from DTD’s to schemas with OAI choosing to use schemas

ADN Metadata Framework A strongly data-typed common XML-schema based framework for ADEPT, NASA & DLESE Describes (previous plus more) geospatial, collection, more educational elements review, models, temporal (all under development) Can do error checking at catalog time rather than ingest time Supports modular framework development Hybrid of IMS and DC but with specific community-driven fields.

Metadata Development Conceptually In Design Planetary Body Other Planetary Body Geodetic Reference System Bounding Box North/South Coordinates East/West Coordinates Vertical Place-event Name Detailed Geometry ….. In Design Definition & Interpretation: Technical Implementation: Cataloging Best Practices: Tag Set Name: Obligation: Maximum Occurrences: Data Type: Domain: Example Entry: Default Value: Vocabulary Source: Vocabulary Terms:

Metadata Reality <geoCoverage> <planet></planet> <otherPlanet></otherPlanet> <geodetic></geodetic> <boundBox> <westCoord></westCoord> <eastCoord></eastCoord> ….. </geoCoverage>

What can the Catalog System do? Contribute: create initial metadata records Discover: provides an internal metadata record search capability using controlled vocabularies & keywords. Can also search over resource content when available Manage: move & edit; keyword & fielded search, some controlled vocabulary search; QA processes are done here Share: share records between collections using OAI (not yet implemented)

DLESE Catalog System (Specs) Structure: XML files in flat directories (no database); Uses DLESE-IMS metadata; no ADN Assumption: unique mapping between library ID and URLs Underlying Indexes: (what is discoverable) Metadata index Resource content index Technical Specification: IE 5.x or higher, Netscape: 6.0, Lucene 1.0, Tomcat 4.0, Java 1.3, JDOM Beta 7

Types of Searches Over Metadata (4-22-02) Metadata Index Search Manage Discover 1. Keyword Over any editable field (includes URL, org) geology:908 Over description, title, topic, resource type & grade level geology: 873 2. Controlled Vocabulary Implemented over topic, resource type and grade level +topic:geology: 794 Over topic, resource type & grade level checkbox geology:609 3. Fielded Over editable fields +topic:geology: 794 +title:geology: 177 Not supported

Actual Tasks Catalog your favorite site. Find all records that Holly Devaul created. Cataloger Goodman forgets her DLESE ID but knows her resource is about hurricanes. Find “salinity” resources.

Benefits of Catalog System DLESE Objects to collections Collection management Interoperability with Partners & NSDL Collection Builders Integrated system supporting collections development Can support distributed development Makes interoperability transparent