- From: Marcelo Arenas <marcelo.arenas1@gmail.com>
- Date: Tue, 14 Sep 2010 07:01:06 -0400
- To: Richard Cyganiak <richard@cyganiak.de>
- Cc: Juan Sequeda <juanfederico@gmail.com>, Michael Hausenblas <michael.hausenblas@deri.org>, RDB2RDF WG <public-rdb2rdf-wg@w3.org>
Hi Richard, On Tue, Sep 14, 2010 at 4:18 AM, Richard Cyganiak <richard@cyganiak.de> wrote: > Hi Juan, > > On 13 Sep 2010, at 21:12, Juan Sequeda wrote: >> >> http://www.w3.org/2001/sw/rdb2rdf/wiki/Default_Mapping > > Quick question since I won't be on the call today: How does this deal with > tables that have no primary key defined? If a relation R(a_1, ..., a_n), with attributes a_1, ..., a_n, does not have a primary key, then one can use a_1, ..., a_n as the identifier of the tuples in R (that is, one can use a_1, ..., a_n as a primary key of relation R). Cheers, Marcelo
Received on Tuesday, 14 September 2010 11:01:33 UTC