ARC enables the combination of efforts like microformats with the utility of selected RDF solutions such as agile data storage, run-time model changes, standardized query interfaces, and mashup chaining. RDF enhances web site productivity and development and ARC is developed only with practical cases in mind.

Installation:
ARC2 introduces a static class which is all that needs to be included. Any other component can then be loaded via ARC2, without the need to know the exact path to the class file.
Example: include_once("path/to/arc/ARC2.php");

Key Features of ARC:
- ConNeg-capable Web Reader - Support for proxies, redirects, and Content Negotiation
- Various parsers - RDF/XML, Turtle, SPARQL + SPOG, Legacy XML, HTML tag soup, RSS 2.0, Google Social Graph API JSON
- Serializers - N-Triples, RDF/JSON, RDF/XML, Turtle, SPOG dumps
- 2 internal structures - resource-centric processing, statement-centric processing
- RDF Storage (using MySQL) - SPARQL SELECT, ASK, DESCRIBE, CONSTRUCT, + aggregates, LOAD, INSERT, and DELETE
- SPARQL Endpoint Class - Set up a compliant SPARQL endpoint with 3 lines of code
- SemHTML RDF extractors - DC, eRDF, microformats, OpenID, RDFa
- RemoteStore Class - Query remote SPARQL endpoints as if they were local stores (results are returned as native PHP arrays)
- Turtle templating - Generate dynamic graphs
- Plugins - Extend ARC with your own, custom extensions
- Triggers - Register event handlers for selected SPARQL Query types
- SPARQLScript - SPARQL-based scripting and output templating
- Light-weight inferencing - Label resolution and resource ID consolidation (a.k.a. Smushing)