mirror of https://github.com/tdwg/dwc.git
129 lines
7.5 KiB
Markdown
129 lines
7.5 KiB
Markdown
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## Examples - RDFa
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### Tagging content in HTML with Darwin Core terms
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[RDFa](http://www.w3.org/TR/rdfa-syntax/) provides a mechanism for expressing
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semantic markup within HTML documents using RDF constructs.
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Resources:
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* An [RDFa parser](http://www.siatec.net/rdfaparser/) is available to convert RDFa to RDF. Note that this parser seems to drop the rdf typeof property.
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* A [simple standalone RDFa to RDF converter](http://code.google.com/p/darwincore/source/browse/trunk/examples/rdfa_content/rdfa2rdf.py) in python.
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* The [W3C RDF validator](http://www.w3.org/RDF/Validator/) provides a convenient tool for quickly visualizing an RDF structure.
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#### Example 1: Name without context
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Indicating that a string within a document is semantically equivalent
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to a scientific name as defined in the Darwin Core.
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There is no additional information about the scientific name, only an indication that the character string represents a scientific name, and so parsers that are able to interpret RDFa are able to identify that value in the document, though no additional context is explicitly stated.
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* [Source](http://darwincore.googlecode.com/svn/trunk/examples/rdfa_content/sciname_1.html)
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* [RDF](http://www.siatec.net/rdfaparser/index.php?xml=http%3A%2F%2Fdarwincore.googlecode.com%2Fsvn%2Ftrunk%2Fexamples%2Frdfa_content%2Fsciname_1.html)
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* [RDF Visualized](http://www.w3.org/RDF/Validator/ARPServlet?URI=http%3A%2F%2Fwww.siatec.net%2Frdfaparser%2Findex.php%3Fxml%3Dhttp%253A%252F%252Fdarwincore.googlecode.com%252Fsvn%252Ftrunk%252Fexamples%252Frdfa_content%252Fsciname_1.html&PARSE=Parse+URI%3A+&TRIPLES_AND_GRAPH=PRINT_BOTH&FORMAT=PNG_EMBED)
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```HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"
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xmlns:dc="http://purl.org/dc/terms/"
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xmlns:dwc="http://rs.tdwg.org/dwc/terms/">
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<head >
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<title>Scientific Name in RDFa</title>
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<meta about='taxonname_1.html' property='dc:creator' content="Dave Vieglais"/>
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<meta about='taxonname_1.html' property='dc:date' content="2008-11-14T09:52:00+00:00" />
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<meta about='taxonname_1.html' property='dc:description' content="Demonstrates how to
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tag a scientific name with RDFa markup so that a parser can recognize that a string
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value represents a scientific name." />
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</head>
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<body>
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<p>This example shows how to tag a scientific name with RDFa markup so that a
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parser can recognize that the string
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<span property='dwc:scientificName' style='font-style: italic;'>Bufo marinus</span>
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as a scientific name, and the string "<span property='dwc:family'>Bufonidae</span>
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is a family name, but there is no statement that the B. marinus is a
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member of the family Bufonidae.</p>
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</body>
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</html>
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```
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#### Example 2: Name with simple context
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This example wraps the scientific name and family within a named node, implying that the two are properties about the node rather than the whole document. This in turn infers that the scientific name is a member of the family, although this information is only contained in the human readable descriptions of the Darwin Core terms and can not be directly inferred from the RDF.
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* [Source](http://darwincore.googlecode.com/svn/trunk/examples/rdfa_content/sciname_2.html)
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* [RDF](http://www.siatec.net/rdfaparser/index.php?xml=http%3A%2F%2Fdarwincore.googlecode.com%2Fsvn%2Ftrunk%2Fexamples%2Frdfa_content%2Fsciname_2.html)
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* [RDF Visualized](http://www.w3.org/RDF/Validator/ARPServlet?URI=http%3A%2F%2Fwww.siatec.net%2Frdfaparser%2Findex.php%3Fxml%3Dhttp%253A%252F%252Fdarwincore.googlecode.com%252Fsvn%252Ftrunk%252Fexamples%252Frdfa_content%252Fsciname_2.html&PARSE=Parse+URI%3A+&TRIPLES_AND_GRAPH=PRINT_BOTH&FORMAT=PNG_EMBED)
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```HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"
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xmlns:dc="http://purl.org/dc/terms/"
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xmlns:dwc="http://rs.tdwg.org/dwc/terms/">
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<head>
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<title>Scientific Name in RDFa</title>
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<meta about='taxonname_2.html' property='dc:creator' content="Dave Vieglais"/>
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<meta about='taxonname_2.html' property='dc:date' content="2008-11-14T09:52:00+00:00" />
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<meta about='taxonname_2.html' property='dc:description' content="Demonstrates how to
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tag a scientific name with RDFa markup so that a parser can recognize that a string
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value represents a scientific name." />
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</head>
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<body>
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<p>This example shows how to tag a scientific name with RDFa markup so that a
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parser can recognize that the string
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<span about='#name1' typeof='dwct:Record'>
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<span property='dwc:scientificName' style='font-style: italic;'>Bufo marinus</span>
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as a scientific name, and the string "<span property='dwc:family'>Bufonidae</span>
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is a family name</span>, and since both terms form part of a Darwin Core record,
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infers that Bufonidae is the family name for "#name1"e; and Bufo marinus
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is the scientific name.</p>
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</body>
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</html>
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```
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### Example 3 Observation with name and location
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Describes an observation in a HTML document using RDFa notation. This minimal example expresses the location two ways- using the Darwin Core DecimalLatitude and DecimalLongitude terms and the GeoRSS point.
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* [Source](http://darwincore.googlecode.com/svn/trunk/examples/rdfa_content/sciname_location.html)
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* [RDF](http://www.siatec.net/rdfaparser/index.php?xml=http%3A%2F%2Fdarwincore.googlecode.com%2Fsvn%2Ftrunk%2Fexamples%2Frdfa_content%2Fsciname_location.html RDF)
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* [RDF Visualized](http://www.w3.org/RDF/Validator/ARPServlet?URI=http%3A%2F%2Fwww.siatec.net%2Frdfaparser%2Findex.php%3Fxml%3Dhttp%253A%252F%252Fdarwincore.googlecode.com%252Fsvn%252Ftrunk%252Fexamples%252Frdfa_content%252Fsciname_location.html&PARSE=Parse+URI%3A+&TRIPLES_AND_GRAPH=PRINT_BOTH&FORMAT=PNG_EMBED)
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```HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"
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xmlns:dc="http://purl.org/dc/terms/"
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xmlns:dwc="http://rs.tdwg.org/dwc/terms/"
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xmlns:dwct="http://rs.tdwg.org/dwc/dwctype/"
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xmlns:georss='http://www.georss.org/georss#'>
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<head >
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<title>Scientific Name in RDFa</title>
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<meta about='sciname_location.html' property='dc:creator' content="Dave Vieglais"/>
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<meta about='sciname_location.html' property='dc:date' content="2008-11-14T09:52:00+00:00" />
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<meta about='sciname_location.html' property='dc:description' content="Demonstrates how to
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create the equivalent of a simple observation record within a HTML document that can be
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converted to an RDF document." />
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</head>
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<body>
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<p>This example document contains a record with of an observation tagged with an lsid of xxx
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<span about="lsid:blah.blah" typeof="oboe:Observation">
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that includes the scientific name
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<span property='dwc:scientificName' style='font-style: italic;'>Bufo marinus</span>,
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<span about='lsid:blah.blah' typeof="dc:Location" >
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<span property='dwc:geodeticDatum' content='epsg:4326' />
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a geographic location of
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<span about='lsid:blah.blah' property='georss:point' content='-25.273262 152.725067' />
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longitude <span property='dwc:decimalLongitude'>152.725067</span> east,
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latitude <span property='dwc:decimalLatitude'>-25.273262</span>,
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</span>
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and a time of
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<span about='lsid:blah.blah' property='dwc:eventDate' content="2008-11-10T23:32:00+00:00">
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9:32 in the morning of the 12th of November.</span>
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</span>
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</p>
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</body>
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</html>
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```
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