This lecture covers a lot of topics. It hits all the basic standards and technologies in the Semantic Web stack: the RDF data model, SPARQL, RDF Schema, and OWL- however, none in great depth. However, the focus is placed on how these technologies sit on top of the Web infrastructure which is already in place. HyperText Transport Protocol (HTTP) is discussed in detail.
Keywords: HTTP URIs, RDF Schema, Web Ontology Language (OWL), SPARQL, HyperText Transfer Protocol (HTTP)
Author: Norton, Barry
Date created: 2012-07-04 04:00:00.000
Time required: P90M
Educational use: professionalDevelopment
- Chooses "hash"- or "slash"-based URI patterns based on requirements.
- Knows Hypertext Transfer Protocol, or HTTP (1991+), as the basic technology for resolving hyperlinks and transferring data on the World Wide Web.
- Knows Representational State Transfer, or REST (2000) as a software architectural style whereby browsers can exchange data with web servers, typically on the basis of well-known HTTP actions.
- Knows Web Ontology Language, or OWL (2004), as a RDF vocabulary of properties and classes that extend support for expressive data modeling and automated inferencing (reasoning).
- Understands that a SPARQL query matches an RDF graph against a pattern of triples with fixed and variable values.
- Understands that to be "persistent", a URI must have a stable, well-documented meaning and be plausibly intended to identify a given resource in perpetuity.
- Understands trade-offs between "opaque" URIs and URIs using version numbers, server names, dates, application-specific file extensions, query strings or other obsoletable context.
- Understands the purpose of publishing RDF vocabularies in multiple formats using content negotiation.