Hi I am new to Sparql but need to perform 500 postcode searches on this link HM Land Registry Open Data and was really pleased to see that Knime had a Sparql extension.
I’ve got the endpoint and query nodes in a workflow and have simply copied the code from the website. Needless to say it doesn’t work. I’d like to get it working for one search then I need to loop it for my list of 500 postcodes.
The endpoint node executes (HM Land Registry Open Data) but the query node gives this error message:
ERROR SPARQL Query 0:27 Execute failed: Endpoint returned Content-Type: text/html which is not currently supported for SELECT queries
As I said, I’m a complete newcomer to Sparql so any advice gratefully received