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timrdf edited this page Mar 25, 2011 · 22 revisions

See Suggested ordering of predicates on a conversion:Enhancement.

Example

The URIs for classes created for during conversion are "internal" to the dataset's vocabulary. This is done to avoid premature collisions with other similar terms with different meanings and representation intentions. A Subclass enhancement types instances to classes from more popular ontologies in addition to the default typing to an internal class.

The subclass enhancement can be applied to classes created by implicit bundles (see #Implicit column bundle resource promotion).

e.g., Dataset 1350

@prefix foaf:       <http://xmlns.com/foaf/0.1/> .
@prefix wgs:        <http://www.w3.org/2003/01/geo/wgs84_pos#> .
@prefix conversion: <http://purl.org/twc/vocab/conversion/> .
@prefix :           <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/version/2009-May-18/params/enhancement/1/> .

:dataset a void:Dataset;
conversion:base_uri           "http://logd.tw.rpi.edu"^^xsd:anyURI;
conversion:source_identifier  "data-gov";
conversion:dataset_identifier "1350";
conversion:dataset_version    "2009-May-18";
conversion:conversion_process [
   a conversion:RawConversionProcess;
   conversion:enhancement_identifier "1";
   conversion:subject_discriminator  "appe-app-e";
   conversion:enhance [
      ov:csvCol         1;
      ov:csvHeader     "Licensee";
      conversion:label "Licensee";
      conversion:range  rdfs:Resource;
      conversion:range_name "<font color="#FF0000">Licensee</font>";
   ];
   conversion:enhance [
      conversion:<font color="#FF0000">class_name "Licensee"</font>;
      conversion:<font color="#FF0000">subclass_of foaf:Organization</font>;
   ];
   conversion:enhance [
      ov:csvCol         2;
      ov:csvHeader     "Location";
      conversion:label "Location";
      conversion:range  rdfs:Resource;
      conversion:range_name "<font color="#FF0000">Location</font>";
   ];
   conversion:enhance [
      conversion:<font color="#FF0000">class_name "Location"</font>;
      conversion:<font color="#FF0000">subclass_of wgs:SpatialThing</font>;
   ];

@prefix raw:               <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/vocab/raw/> .
@prefix ds1350-appe-app-e: <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/appe-app-e/version/2009-May-18/> .

<font color="0000FF">ds1350-appe-app-e:thing_1<font>
  raw:licensee "Aerotest" ;
  raw:location "San Ramon, CA" .

becomes

@prefix e1:                <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/vocab/enhancement/1/> .
@prefix ds1350_vocab:      <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/vocab/> .
@prefix value_of_licensee: <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/appe-app-e/value-of/licensee/> .
@prefix value_of_location: <http://logd.tw.rpi.edu/source/data-gov/dataset/1350/appe-app-e/value-of/location/> .

<font color="0000FF">ds1350-appe-app-e:thing_1<font>
  e1:licensee typed_licensee:Aerotest ;
  e1:location typed_location:San_Ramon_CA .

typed_licensee:Aerotest 
  a ds1350_vocab:<font color="#FF0000">Licensee</font>, <font color="#FF0000">foaf:Organization</font> ;
  rdfs:label "Aerotest" .

typed_location:San_Ramon_CA 
  a ds1350_vocab:<font color="#FF0000">Location</font>, <font color="#FF0000">wgs:SpatialThing</font> ;
  rdfs:label "San Ramon, CA" .

The conversion:domain_name and conversion:range_name properties provide the local label names to create two classes: http://logd.tw.rpi.edu/source/data-gov/dataset/1554/vocab/FOIA_Request http://logd.tw.rpi.edu/source/data-gov/dataset/1554/vocab/Requester

The conversion:class_name property cites the local label name of the class that should be subclassed.

Classes present in the internal dataset namespace are created using when using the properties: conv:domain_name (via #Subject type parameter) conv:range_name (via #Typed resource promotion parameter) conv:type_name (via #Implicit column bundle resource promotion parameter)

Other datasets that benefit from this enhancement include Dataset 1530 (Requester->foaf:Person), and Dataset 1492 (Applicant->foaf:Agent).

What datasets use this enhancement?

39

PREFIX rdfs:       <http://www.w3.org/2000/01/rdf-schema#>
PREFIX xsd:        <http://www.w3.org/2001/XMLSchema#>
PREFIX conversion: <http://purl.org/twc/vocab/conversion/>

SELECT count(distinct ?enhancement)
WHERE {
  GRAPH <http://purl.org/twc/vocab/conversion/ConversionProcess> {
    ?dataset a void:Dataset;
      conversion:conversion_process [
        conversion:enhance ?enhancement
      ]
    .
    ?enhancement conversion:subclass_of ?super .
  }
}

Queries

Datasets with enhancements that subclass their local classes to more commonly acknowledged classes (results):

prefix conversion: <http://purl.org/twc/vocab/conversion/>

select distinct ?source ?dataset ?version ?local ?super
where {
  graph <http://purl.org/twc/vocab/conversion/ConversionProcess> {
    ?layer
      conversion:source_identifier  ?source;
      conversion:dataset_identifier ?dataset;
      conversion:conversion_process [
        conversion:enhancement_identifier ?e;
        conversion:enhance [ 
          conversion:class_name  ?local;
          conversion:subclass_of ?super
        ]
      ] 
    optional {?layer conversion:dataset_version    ?version}
    optional {?layer conversion:version_identifier ?version}
  }
} order by ?super ?local ?source ?dataset ?version

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