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Hi, I have several questions regarding to
DELETE capability inside tracker. Seems tracker works well with INSERT, but
not that well with DELETE. 1, I can’t delete the
nie:contentLastModified time which I manually inserted before. The below
function won’t work, but it is an example in tracker wiki page tracker-sparql -u -q " DELETE { ?f
nie:contentLastModified ?unknown } WHERE { ?f nie:url
<file:///home/zbt/Videos/video/ball_444.jpg> } " 2, I can’t *completely* delete
a tag that I inserted before, after delete, only the nao:prefLabel is cleared. INSERT works: tracker-sparql -u -q "INSERT { _:tag a
nao:Tag ; nao:prefLabel 'value' ; nao:identifier 'key' . ?object nao:hasTag
_:tag } WHERE { ?object a nie:InformationElement . FILTER (str(?object) =
'urn:uuid:bc9feedf-89ce-b9ed-fdba-5300586651dd') }" then DELETE: tracker-sparql -u -q "DELETE {?tag a
nao:Tag } WHERE {?object nao:hasTag ?tag . ?tag nao:identifier 'key' . { SELECT
?object WHERE {?object a nie:InformationElement . FILTER (str(?object) =
'urn:uuid:bc9feedf-89ce-b9ed-fdba-5300586651dd') } } }" then QUERY: tracker-sparql -q "SELECT
nao:prefLabel(?tag) nao:identifier(?tag) ?tag WHERE {?object a
nie:InformationElement; nao:hasTag ?tag . ?tag nao:identifier 'key' . FILTER
(str(?object) = 'urn:uuid:bc9feedf-89ce-b9ed-fdba-5300586651dd')}" the QUERY results shows tag still exists,
only the prefLabel is cleared. Can someone help here? Thanks a lot! |