Add csvw task.

Issue #31 - Update each pipeline to output CSVW to the specified
directory instead of generating the output RDF directly. Update
the exec task to write the CSVW to a temporary directory and
write the RDF using csv2rdf. The cube pipeline now only creates
a single metadata file instead of one for each element (e.g. dataset
metadata, DSD etc.). Update each metadata function in the cube
namespace to return a table definition instead of a full metadata
definition by removing the @context key.

Add new csvw task which writes the CSVW output for each pipeline
to the specified directory.

Update the output of the describe task to include an example
invocation of the csvw command.

examples/bop-quarterly/csvw/component-specifications.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"url":"component-specifications.csv","dc:title":"BoP Quarterly Example","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","propertyUrl":"{+component_attachment}","valueUrl":"{+component_property}"},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:ComponentSpecification"},{"name":"codes_used","virtual":true,"propertyUrl":"http:\/\/publishmydata.com\/def\/qb\/codesUsed","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/codes-used\/{component_slug}"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/component\/{component_slug}"}}
+{"url":"component-specifications.csv","dc:title":"BoP Quarterly Example","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","propertyUrl":"{+component_attachment}","valueUrl":"{+component_property}"},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:ComponentSpecification"},{"name":"codes_used","virtual":true,"propertyUrl":"http:\/\/publishmydata.com\/def\/qb\/codesUsed","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/codes-used\/{component_slug}"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/component\/{component_slug}"}}

examples/bop-quarterly/csvw/data-structure-definition.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"@id":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/structure","url":"component-specifications.csv","dc:title":"BoP Quarterly Example (Data Structure Definition)","rdf:type":{"@id":"qb:DataStructureDefinition"},"rdfs:label":"BoP Quarterly Example (Data Structure Definition)","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","propertyUrl":"qb:component","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/component\/{component_slug}"},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","suppressOutput":true}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/structure"}}
+{"@id":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/structure","url":"component-specifications.csv","dc:title":"BoP Quarterly Example (Data Structure Definition)","rdf:type":{"@id":"qb:DataStructureDefinition"},"rdfs:label":"BoP Quarterly Example (Data Structure Definition)","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","propertyUrl":"qb:component","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/component\/{component_slug}"},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","suppressOutput":true}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/structure"}}

examples/bop-quarterly/csvw/dataset.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"@id":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example","url":"component-specifications.csv","dc:title":"BoP Quarterly Example","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","suppressOutput":true},{"name":"component_property","titles":"component_property","suppressOutput":true},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:DataSet"},{"name":"structure","virtual":true,"propertyUrl":"qb:structure","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/structure"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example"}}
+{"@id":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example","url":"component-specifications.csv","dc:title":"BoP Quarterly Example","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","suppressOutput":true},{"name":"component_property","titles":"component_property","suppressOutput":true},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:DataSet"},{"name":"structure","virtual":true,"propertyUrl":"qb:structure","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/structure"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example"}}

examples/bop-quarterly/csvw/observations.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"url":"observations.csv","tableSchema":{"columns":[{"name":"geography","titles":"geography","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/sdmx\/2009\/dimension#refArea","valueUrl":"http:\/\/statistics.data.gov.uk\/id\/statistical-geography\/{geography}"},{"name":"period","titles":"period","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/sdmx\/2009\/dimension#refPeriod","valueUrl":"http:\/\/reference.data.gov.uk\/id\/{+period}"},{"name":"cdid","titles":"cdid","datatype":"string","propertyUrl":"http:\/\/gss-data.org.uk\/def\/attribute\/cdid"},{"name":"services","titles":"services","datatype":"string","propertyUrl":"http:\/\/gss-data.org.uk\/def\/dimension\/service","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/services\/{service}"},{"name":"flow","titles":"flow","datatype":"string","propertyUrl":"http:\/\/gss-data.org.uk\/def\/dimension\/flow","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/flow-directions\/{flow}"},{"name":"measure_type","titles":"measure_type","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/cube#measureType","valueUrl":"http:\/\/gss-data.org.uk\/def\/measure\/{measure_type}"},{"name":"value","titles":"value","datatype":"number","propertyUrl":"http:\/\/gss-data.org.uk\/def\/measure\/{measure_type}"},{"name":"unit","titles":"unit","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/sdmx\/2009\/attribute#unitMeasure","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/measurement-units\/{unit}"},{"name":"Observation","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:Observation"},{"name":"DataSet","virtual":true,"propertyUrl":"qb:dataSet","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/{+geography}\/{+period}\/{+cdid}\/{+services}\/{+flow}\/{+measure_type}\/{+unit}"}}
+{"url":"observations.csv","tableSchema":{"columns":[{"name":"geography","titles":"geography","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/sdmx\/2009\/dimension#refArea","valueUrl":"http:\/\/statistics.data.gov.uk\/id\/statistical-geography\/{geography}"},{"name":"period","titles":"period","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/sdmx\/2009\/dimension#refPeriod","valueUrl":"http:\/\/reference.data.gov.uk\/id\/{+period}"},{"name":"cdid","titles":"cdid","datatype":"string","propertyUrl":"http:\/\/gss-data.org.uk\/def\/attribute\/cdid"},{"name":"services","titles":"services","datatype":"string","propertyUrl":"http:\/\/gss-data.org.uk\/def\/dimension\/service","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/services\/{service}"},{"name":"flow","titles":"flow","datatype":"string","propertyUrl":"http:\/\/gss-data.org.uk\/def\/dimension\/flow","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/flow-directions\/{flow}"},{"name":"measure_type","titles":"measure_type","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/cube#measureType","valueUrl":"http:\/\/gss-data.org.uk\/def\/measure\/{measure_type}"},{"name":"value","titles":"value","datatype":"number","propertyUrl":"http:\/\/gss-data.org.uk\/def\/measure\/{measure_type}"},{"name":"unit","titles":"unit","datatype":"string","propertyUrl":"http:\/\/purl.org\/linked-data\/sdmx\/2009\/attribute#unitMeasure","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/measurement-units\/{unit}"},{"name":"Observation","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:Observation"},{"name":"DataSet","virtual":true,"propertyUrl":"qb:dataSet","valueUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/{+geography}\/{+period}\/{+cdid}\/{+services}\/{+flow}\/{+measure_type}\/{+unit}"}}

examples/bop-quarterly/csvw/used-codes-codelists.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"url":"component-specifications.csv","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","suppressOutput":true},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"skos:ConceptScheme"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/codes-used\/{component_slug}"}}
+{"url":"component-specifications.csv","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","suppressOutput":true},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"skos:ConceptScheme"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/codes-used\/{component_slug}"}}

examples/bop-quarterly/csvw/used-codes-codes.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"url":"observations.csv","tableSchema":{"columns":[{"name":"geography","titles":"geography","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/statistics.data.gov.uk\/id\/statistical-geography\/{geography}"},{"name":"period","titles":"period","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/reference.data.gov.uk\/id\/{+period}"},{"name":"cdid","titles":"cdid","datatype":"string","propertyUrl":"skos:member"},{"name":"services","titles":"services","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/services\/{service}"},{"name":"flow","titles":"flow","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/flow-directions\/{flow}"},{"name":"measure_type","titles":"measure_type","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/measure\/{measure_type}"},{"name":"value","titles":"value","datatype":"number","propertyUrl":"skos:member","suppressOutput":true},{"name":"unit","titles":"unit","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/measurement-units\/{unit}"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/codes-used\/{_name}"}}
+{"url":"observations.csv","tableSchema":{"columns":[{"name":"geography","titles":"geography","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/statistics.data.gov.uk\/id\/statistical-geography\/{geography}"},{"name":"period","titles":"period","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/reference.data.gov.uk\/id\/{+period}"},{"name":"cdid","titles":"cdid","datatype":"string","propertyUrl":"skos:member"},{"name":"services","titles":"services","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/services\/{service}"},{"name":"flow","titles":"flow","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/flow-directions\/{flow}"},{"name":"measure_type","titles":"measure_type","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/measure\/{measure_type}"},{"name":"value","titles":"value","datatype":"number","propertyUrl":"skos:member","suppressOutput":true},{"name":"unit","titles":"unit","datatype":"string","propertyUrl":"skos:member","valueUrl":"http:\/\/gss-data.org.uk\/def\/concept\/measurement-units\/{unit}"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/bop-quarterly-example\/codes-used\/{_name}"}}

examples/overseas-trade/csvw/component-specifications.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"url":"component-specifications.csv","dc:title":"Overseas Trade Sample","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","propertyUrl":"{+component_attachment}","valueUrl":"{+component_property}"},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:ComponentSpecification"},{"name":"codes_used","virtual":true,"propertyUrl":"http:\/\/publishmydata.com\/def\/qb\/codesUsed","valueUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/codes-used\/{component_slug}"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/component\/{component_slug}"}}
+{"url":"component-specifications.csv","dc:title":"Overseas Trade Sample","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","propertyUrl":"{+component_attachment}","valueUrl":"{+component_property}"},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:ComponentSpecification"},{"name":"codes_used","virtual":true,"propertyUrl":"http:\/\/publishmydata.com\/def\/qb\/codesUsed","valueUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/codes-used\/{component_slug}"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/component\/{component_slug}"}}

examples/overseas-trade/csvw/data-structure-definition.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"@id":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/structure","url":"component-specifications.csv","dc:title":"Overseas Trade Sample (Data Structure Definition)","rdf:type":{"@id":"qb:DataStructureDefinition"},"rdfs:label":"Overseas Trade Sample (Data Structure Definition)","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","propertyUrl":"qb:component","valueUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/component\/{component_slug}"},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","suppressOutput":true}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/structure"}}
+{"@id":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/structure","url":"component-specifications.csv","dc:title":"Overseas Trade Sample (Data Structure Definition)","rdf:type":{"@id":"qb:DataStructureDefinition"},"rdfs:label":"Overseas Trade Sample (Data Structure Definition)","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","datatype":"string","propertyUrl":"qb:component","valueUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/component\/{component_slug}"},{"name":"component_attachment","titles":"component_attachment","datatype":"string","suppressOutput":true},{"name":"component_property","titles":"component_property","datatype":"string","suppressOutput":true}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/structure"}}

examples/overseas-trade/csvw/dataset.json

@@ -1 +1 @@
-{"@context":["http:\/\/www.w3.org\/ns\/csvw",{"@language":"en"}],"@id":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample","url":"component-specifications.csv","dc:title":"Overseas Trade Sample","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","suppressOutput":true},{"name":"component_property","titles":"component_property","suppressOutput":true},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:DataSet"},{"name":"structure","virtual":true,"propertyUrl":"qb:structure","valueUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/structure"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample"}}
+{"@id":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample","url":"component-specifications.csv","dc:title":"Overseas Trade Sample","tableSchema":{"columns":[{"name":"component_slug","titles":"component_slug","suppressOutput":true},{"name":"component_attachment","titles":"component_attachment","suppressOutput":true},{"name":"component_property","titles":"component_property","suppressOutput":true},{"name":"type","virtual":true,"propertyUrl":"rdf:type","valueUrl":"qb:DataSet"},{"name":"structure","virtual":true,"propertyUrl":"qb:structure","valueUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample\/structure"}],"aboutUrl":"http:\/\/gss-data.org.uk\/data\/overseas-trade-sample"}}