This is the home page for the HAPI project. HAPI (HL7 application programming interface; pronounced "happy") is an open-source, object-oriented HL7 2.x parser for Java. HL7 (http://hl7.org) is a messaging specification for healthcare information systems. This project is not affiliated with the HL7 organization; we are just writing some software that conforms to their specification. The project was initiated by University Health Network (a large multi-site teaching hospital in Toronto, Canada)

While many different technologies and schemas exist and could be combined together, there isn't a single technology which provides enough information to richly represent any web page within the social graph. The Open Graph protocol builds on these existing technologies and gives developers one thing to implement. Developer simplicity is a key goal of the Open Graph protocol which has informed many of the technical design decisions.

The Talis Platform weaves Data with the Web to create a highly available and adaptable environment for data sharing. Supporting data publishers and developers. the Platform offers services operating on highly-connected data through its RESTful API:

However like dark matter, dark users are observable due to their effects on the rest of the universe. If a dark user comments on a stream entry, I can see that comment. More importantly, I can see their user-ID, and I can generate a URL to a page that will contain their name. I can then watch for their activities elsewhere. Granted, I can't directly search for their activity, but I can observe their effects on my friends. For want of a better term, I've been calling this "dark stalking".