How To INSERT All Triples From An RDFlib Graph Into Another Repository Without Iterating Through Every Triple?

This question is related to What URI to use for a Sesame repository while executing a SPARQL ADD query. I'm trying to INSERT all triples from a Sesame repository into another (Dydr

Solution 1:

I'm not gonna bother answering why you get that syntax error on that SPARQL update, since it seems immaterial to what you actually want to know. I'm also not going to bother answering how to upload an RDFLib graph to Dydra, since that also seems immaterial to what you want to know. What I'll answer here is how you can upload data from a Sesame store to a Dydra store, programmatically, without having to iterate over all triples, and without use of the SERVICE clause.

Dydra's REST API is basically identical to the Sesame REST API, so most REST operations you can do on a Sesame store you can also execute on a Dydra store.

You can do a HTTP POST request to your Dydra store's REST API URL for statements: repository/<ACCOUNT_ID>/<REPO_ID>/statements (see here in the Dydra docs for more details). Add a parameter url which points to the URL of your source Sesame store URL for statements: (repository/<REPO_ID>/statements). Also make sure you specify a Content-Type HTTP header in your POST request that specifies the MIME-type of an RDF syntax format supported by Dydra (a good pick is something like TriG or N-Quads, since these formats support named graphs).

You don't even need RDFLib for any of this. Presumably you know how to do a simple HTTP request from Python, if not I'm sure there's examples aplenty as it's a fairly generic thing to do.