SPARQL Update example for updating more than one triple in a single query

Question

Can anyone point me to a valid UPDATE statement in SPARQL in any documentation (be it W3C, virtuoso, semantic web page, or your own custom code, etc?

It has

Answer 1

In SPARQL updates are represented as a DELETE followed by an INSERT:

http://www.w3.org/TR/2010/WD-sparql11-update-20100126/#t413

PREFIX foaf:  

WITH 
DELETE { ?person foaf:firstName 'Bill' }
INSERT { ?person foaf:firstName 'William' }
WHERE
  { ?person a foaf:Person .
    ?person foaf:firstName 'Bill'
  }