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conversion:date_pattern · timrdf/csv2rdf4lod-automation Wiki · GitHub
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conversion:date_pattern
Tim L edited this page Aug 12, 2013
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24 revisions
csv2rdf4lod-automation is licensed under the [Apache License, Version 2.0](https://github.com/timrdf/csv2rdf4lod-automation/wiki/License)
See conversion:Enhancement. See also conversion:datetime_pattern.
Patterns are now processed with Joda time.
conversion:date_pattern specifies how to parse a cell's literal value into a date. The pattern is specified by Java's date patterns. This only has effect when conversion:range is xsd:date.
conversion:enhance [
ov:csvCol 4;
ov:csvHeader "Completion_Date";
conversion:label "Completion_Date";
conversion:comment "";
conversion:range xsd:date;
];
If you run the conversion without following Step 2 (below), you will see something like this in the stderr log:
bash-3.2$ ./convert-uk-offshore-oil-wells.sh
...
DATE FAILED: "1989-10-02" !~ 0 patterns @ :thing_2 :completion_date
...
This is telling you that the string did not match any of the zero patterns provided. So let's add some patterns!
This tells the converter how to parse the date.
conversion:enhance [
ov:csvCol 4;
ov:csvHeader "Completion_Date";
conversion:label "Completion_Date";
conversion:comment "";
conversion:eg "1989-10-02";
conversion:pattern "yyyy-MM-dd";
conversion:range xsd:date;
];
Patterns should be specified using Java's SimpleDateFormat, whose table of variables is reproduced here:
PREFIX rdfs: <https://www.w3.org/2000/01/rdf-schema#>
PREFIX xsd: <https://www.w3.org/2001/XMLSchema#>
PREFIX conversion: <https://purl.org/twc/vocab/conversion/>
SELECT distinct ?pattern
WHERE {
GRAPH <https://purl.org/twc/vocab/conversion/ConversionProcess> {
?enhancement conversion:pattern ?pattern .
}
}
PREFIX rdfs: <https://www.w3.org/2000/01/rdf-schema#>
PREFIX xsd: <https://www.w3.org/2001/XMLSchema#>
PREFIX conversion: <https://purl.org/twc/vocab/conversion/>
SELECT count(distinct ?enhancement) as ?count
WHERE {
GRAPH <https://purl.org/twc/vocab/conversion/ConversionProcess> {
?dataset a void:Dataset;
conversion:conversion_process [
conversion:enhance ?enhancement
]
.
?enhancement conversion:pattern ?pattern .
}
}
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