Nov 4 2009: Getting active, or maybe reactivating.

This page is just a collection of links so far. The link above for the 'Miscellaneous' subject is to my own modest effort with Semantic Mediawiki.  It's nascent but coming along.

The entire Semantic Web subject area will be getting a makeover soon.

Weaving Meaning: An Overview of the Semantic Web

Good W3 Powerpoint presentation by Eric Miller.

Jan 26 2009. derived from PHP Wikis and Knowledge Wikis.

Often referred to as "knowledge wikis", they are capable of providing some level of knowledge representation and management functions as well as the usual features available in traditional wikis. They may be the closest existing solution to some of the requirements for a Semantic Web ( however it gets defined ).

Revised Nov 1 2008: Draft of OWL2 specs.

The recent drafts of the OWL2 specification describe some important changes from OWL1. In a nutshell,

The structural specification of OWL 2 provides the foundation for the implementation of OWL 2 tools such as APIs and reasoners. ... This document also defines the functional-style syntax, which closely follows the structural specification and allows OWL 2 ontologies to be written in a compact form.

This is a new topic ... it is more abstract than most content on this site and may be moved to the Home site.

Updated Sept 24 2008: added features and SWCL link

Not sure if WordNet qualifies as the "Semantic Web", but it's definitely semantic whatever the format may be. From the site ( paraprased )

WordNet® is a lexical database containing nouns, verbs, adjectives and adverbs. They aregrouped into "synsets" ( sets of cognitive synonyms ) each expressing a distinct concept. Conceptual-semantic and lexical relations build links between synsets. A browser navigates through the network of meaningfully related words and concepts.

Of the 702 Semantic Web tools listed in Mike Bergman's masterlist, 332 are implmented in Java .... and Java now being a fully open source and open licence language ...

Stray link I'll find a home for: http://www.daml.org/tools/

SWCL - Semantic Web Client Library:

Updated Sept 16 2008

Semantic web search engines ? Social bookmarking run mad ? We shall see. The new search technology is still early in the S-curve and more useful for pop culture subjects than for rule based systems.

From the WikiaSearch project page:

Wikia's search engine concept is that of trusted user feedback from a community of users acting together in an open, transparent, public way.

The Semantic Web held pride of place at the AAAI 2008 Spring Symposium Series.

It's getting serious. Things are moving resolutely forward toward Drupal 6 and 7.

The seems to be some confusion about the difference between 'rule engines' and 'semantic web' applications.  See related link to "Semantic Web Inferencing versus Rule Engines"

Update 3/26/2008 - ARC completely reimplemented and released as ARC2.

Update 7/25/2008 - added Triplify 0.3 section.

From the ARC site:

ARC is a lightweight, SPARQL-enabled RDF system for mainstream Web projects. It is written in PHP and has been optimized for shared (or otherwise performance- or privilege-limited) Web environments.

ARC facilitates the integration of RDF and SPARQL functionality in PHP/MySQL-driven frameworks.

Updated Sept 25 2008: new link This page describes the taxonomy of semantic web topics adopted by the European projects Knowledge Web and REWERSE

OntoGrid provides a technical infrastructure for the rapid prototyping and development of knowledge-intensive services for the Semantic Grid.

Opera has several browser plugins and lively projects to build support for the Semantic Web.

One of most interesting plugins is the Tabulator RDF Browser Plugin. It's one of the few RDF tools that actually works.

The Tabulator Developers Notes ( and source code ) at MIT's DIG-CSAIL.

The main link is to Oracle - Semantic Technologies Center. so far .... From the site:

Semantic Technologies are designed to extend the capabilities of information on the Web and enterprise systems to be networked in meaningful ways. ... Oracle Spatial 11g introduces the industry's first open, scalable, secure and reliable RDF management platform. Based on a graph data model, RDF triples are persisted, indexed and queried, similar to other object-relational data types.