OUseful.Info, the blog…

Just after I put together the pipework for Getting Started with data.gov.uk, Triplr SPARYQL and Yahoo Pipes, I also cut and pasted some of the code from a previous map based mashup to demo how to make a SPARQL call via a pipe that calls on the UK Gov education Linked Data datastore from within a web page, and then display the geocoded results on a map.

Here’s the demo – School openings and closures in the UK, 1/1/08-1/10/09

If you View Source, you’ll see the code boils down to:

//schools closed between 1/1/08 and 1/10/09
q="SELECT ?school ?name ?opendate ?closedate ?easting ?northing WHERE {?school a sch-ont:School;  sch-ont:establishmentName ?name;sch-ont:easting ?easting; sch-ont:northing ?northing; sch-ont:establishmentStatus sch-ont:EstablishmentStatus_Closed ; sch-ont:closeDate ?closedate ; sch-ont:openDate ?opendate . FILTER (?closedate > '2008-01-01'^^xsd:date && ?closedate < '2009-10-01'^^xsd:date)}"

u=ur+encodeURIComponent(q);
getPipeGeoData(u, 'parseJSON_purple');

In all I make three calls to a pipe that calls on the data.gov.uk education datastore, one for schools opened between 1/1/08 and 1/10/09:
SELECT ?school ?name ?opendate ?easting ?northing WHERE {?school a sch-ont:School; sch-ont:establishmentName ?name;sch-ont:easting ?easting; sch-ont:northing ?northing; sch-ont:openDate ?opendate . FILTER (?opendate > '2008-01-01'^^xsd:date && ?opendate < '2009-10-01'^^xsd:date)}

one for schools closed between 1/1/08 and 1/10/09:
SELECT ?school ?name ?opendate ?closedate ?easting ?northing WHERE {?school a sch-ont:School; sch-ont:establishmentName ?name;sch-ont:easting ?easting; sch-ont:northing ?northing; sch-ont:establishmentStatus sch-ont:EstablishmentStatus_Closed ; sch-ont:closeDate ?closedate ; sch-ont:openDate ?opendate . FILTER (?closedate > '2008-01-01'^^xsd:date && ?closedate < '2009-10-01'^^xsd:date)}

and one for schools proposed to close:
SELECT ?school ?name ?easting ?northing ?opendate WHERE {?school a sch-ont:School; sch-ont:establishmentName ?name;sch-ont:easting ?easting; sch-ont:northing ?northing ; sch-ont:establishmentStatus sch-ont:EstablishmentStatus_Open__but_proposed_to_close; sch-ont:openDate ?opendate . }

(I cribbed how to write these queries from a Talis blog: SPARQLing data.gov.uk: Edubase Data;-)

The results of each call are displayed using the different coloured markers.

(The rest of the code is really horrible. Note to self: get round to learning JQuery.)