Versa

Versa or VERSA may refer to:

Versa (query language)

Versa is an RDF query language, that is, a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework (RDF) format. Versa differs from most other RDF query languages, which are typically based on SQL or specialized XML vocabularies. Although the design of Versa was inspired by XPath, its compact, functional syntax also somewhat resembles Lisp. As of 2006, the only Versa implementation is in the Python-language, open source 4Suite XML framework.

History and status

Versa's origins can be traced to 2000, when professional XML consultancy Fourthought, Inc. began developing RIL, an open, XML-based RDF Inference Language. RIL was implemented briefly in Fourthought's 4Suite Server product, which allowed for persistent storage and querying of an RDF model and associated XML document store.

In October 2001, the query portion of RIL was spun off into a separate project named Versa, with the intent that after Versa stabilized, development would resume to establish RIL as a formal language for working Versa query results. RIL development never resumed, however; inference abilities in 4Suite were easily handled by XSLT extensions and did not need a separate language.

Versa (Tanaro)

The Versa, a left tributary of the Tanaro, is a 35-kilometre (22 mi) torrent in the Province of Asti in north-west Italy. It is the river of the valley called Valle Versa. In 1836 the Versa was identified, along with the Rotaldo, the Grana, the Stura and the Gattola, as one of the five torrents of the still extant Province of Casale.

Its source is a little to the north of Cocconato near the border with the Province of Turin. After a generally southerly course of 35 kilometres it enters the Tanaro just to the east of Asti.

This river is not to be confused with the Versa that is a tributary of the Po.

Notes

Coordinates: 44°53′19″N 8°16′10″E / 44.88861°N 8.26944°E / 44.88861; 8.26944