User:Ilya/Registry

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Data or Metadata

(from LSID best practices) Data is defined as a sequence of unchanging bytes. Examples of data are microscope images, a protein sequence, a text file, etc. Metadata is usually information that describes the data either literally (date created, MD5 check sum, size) or contains information describing the relationship between the data and other objects. If you cannot determine what should be data and what should be metadata from your data model, follow this rule of thumb: Large byte sequences are easier to manipulate as data, while short byte sequences can be included as data, metadata, or made available in both forms.

Abstraction Hierarchy

• Part - simple biological function encoded in DNA
• Device - simple logical function; collection of parts
• System - collection of devices
• Device is_a part in context of the system but also device has_a part.
• Device is_a subclass of Part, System is_a subclass of Device
• How to represent barriers and interfaces betwee levels of abstration?
• Genetic, protein and cell devices
• :RBS :subclassOf :BasicPart OR :RBS :typeOf :BasicPart (instance)

Miscellaneous

• Semantics - the meaning that is implied by words and sentences.
• Software agent can search distributed registries using an ontology. This is impossible right now because storage schema is unknown.
• Data is represented by a graph of triples (statements about resources)
• Syntax doesn't matter: there are many ways to serialize the data (XML, N3, etc).
• Ontology vs taxonomy vs thesaurus vs list
• Ontology vs Taxonomy vs Folksonomy vs Collabulary
  • Taxonomy - concepts and relationships but no attributes.
  • Controlled vocabulary - only concepts.
• Microformats
  • "lowercase semantic web"
  • humans first, machines second
• HCLS task forces:
  • BIORDF (Structured data to RDF) - Susie Stephen, Joanne Luciano co-leads
  • T2S (Text to Structured RDF) - Robert Futrelle, Matthew Cockerill
• Architecture of the World Wide Web @ W3C
• Reification @ Wikipedia
• Metadata
  • Semantic mapper is tool or service that aids in the transformation of data elements from one namespace into another namespace.
  • Metadata registry s a central location in an organization where metadata definitions are stored and maintained in a controlled method.

To Do

• Map parts database schema to RDF/OWL (D2R, other?)
• Use LSID for parts identification
  • setup LSID resolution service
• How to represent sequence features?
  • Part has features and has a sequence
  • Sequence has features but a part already has sequence
• Tools to create and edit ontology and RDF instances?
  • Protege from Stanford?
  • IsaViz from W3C?
• existing RDBMS <-> RDF <-> objects (e.g., Javascript)

From XML to RDF

(from [1])

• ?

Knowledge Management

• Thinking XML: Basic XML and RDF techniques for knowledge management
  • Part 1: Generate RDF using XSLT
  • Parl 2: Combining files into an RDF model, and basic RDF querying
  • Part 3: Knowledge from semantics
  • Part 4: Issue tracker schema
  • Part 5: Defining RDF and DAML+OIL
  • Part 6: RDF Query using Versa
  • Part 7: Review and relevance of the techniques discussed
• IBM Systems Journal - Knowledge Management

Links

• RDF in Mozilla

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