XBRL US Request for Proposal: Consistency Checks

[SRIDHAR KRISHNAN]

XBRL US has an RFP out for validation of XBRL document.
http://xbrl.us/press/Pages/20080912.aspx
"The goal of this product is to provide a common core to enable the editing, distribution and processing of validation criteria or consistency checks initially for use by US filers, but also longer term for other regulatory and reporting entities using taxonomies outside the scope of US GAAP."
From what read, XBRL.us is getting into providing web services on "subscription basis" to validate their document.

If they are going to license it, how do they make it vendor agnostic? This goes against the spirit of XBRL being open source.

Any comments?