The namespace http://www.w3.org/ns/legal-entity was adopted temporarily in 2012 by the Government Linked Data Working Group but is no longer in use and may be re-used in any way in future.
The temporary use of this namespace was connected with activities that the Government Linked Data Working Group performed in collaboration with the European Commission, ISA programme.
Therefore the readers, especially those active in the European eGovernment sector, are invited to consult the Core Business Vocabulary under maintenance by the European Commission , or consult the Registered Organization vocabulary.
For more background, see this blog post: Interoperable Governments?.