To my mind most of the questions about semantic web topics and technologies are off-topic in open data stackexchange.
While open data covers topics like:
- freely available/ open data pools
- knowledge bases
- where can I find (historical, governmental, environmental,...) data?
- apis and data formats
Semantic Data cover aspects of:
- ontology modeling
- formats and semantic libraries, that deal with RDF, OWL, SWRL...
- triple store and graph databases
- linked data
For reference look at the tags statistics on the now discontinued answers.semanticweb.com Q/A https://web.archive.org/web/20160320175811/http://answers.semanticweb.com/tags/
There has been an almost similar question Are all Semantic Web technology questions on-topic?
This discussion is also related to the discussion about answers.semanticweb.com migration.
I'm thinking of opening a new site proposal on Area51. There has been something like, that was named Big Data. But this term was too unspecific and did not really address semantic and linked data topics.
I would like to here some opinions on that before I start discussing at area51.