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I want to add need to enable users to easily discovery my data set or service by adding keywords to my metadata. |
Keywords are words or phrases that describe the metadata resource. They facilitate search, indexing and discovery and indexing of metadata, and are they the largest single component of many metadata collections, regardless of the dialect.
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Implementation (XML)<gmd:descriptiveKeywords>
<gmd:MD_Keywords>
<gmd:keyword>
<gco:CharacterString>EARTH SCIENCE > Oceans > Ocean Optics > Optical Depth</gco:CharacterString>
</gmd:keyword>
<gmd:type>
<gmd:MD_KeywordTypeCode
codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode"
codeListValue="service">service</gmd:MD_KeywordTypeCode>
</gmd:type>
<gmd:thesaurusName>
<gmd:CI_Citation>
<gmd:title>
<gco:CharacterString>NASA/GCMD Earth Science Keywords</gco:CharacterString>
</gmd:title>
<gmd:date>
<gmd:CI_Date>
<gmd:date>
<gco:Date>2009-01-01</gco:Date>
</gmd:date>
<gmd:dateType>
<gmd:CI_DateTypeCode
codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode"
codeListValue="revision"/>
</gmd:dateType>
</gmd:CI_Date>
</gmd:date>
</gmd:CI_Citation>
</gmd:thesaurusName>
</gmd:MD_Keywords>
</gmd:descriptiveKeywords> |
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Implementation (NcML)<nc:group name="gmd:descriptiveKeywords"> |
Usage
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Where are MD_Keyword objects?
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The table below reflects the Mends keyword vote item. The mapping of the ECHO keywords to their ISO equivalents are detailed in the Table below. In the case of some of the ECHO attributes, they also map to
ISO Keyword Mappingother ISO fields but this is not part of the vote e.g. Platform/LongName is also described under the EOS extension to acquisition information.
ECHO Source | ISO Xpath (with Keyword Type Code) |
/*/ScienceKeywords/ScienceKeyword/CategoryKeyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString |
/*/ScienceKeywords/ScienceKeyword/TopicKeyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString |
/*/ScienceKeywords/ScienceKeyword/TermKeyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString |
/*/ScienceKeywords/ScienceKeyword/VariableLevelKeyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString |
/*/ScienceKeywords/ScienceKeyword/DetailedVariableKeyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString |
/*/SpatialKeywords/Keyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='place']/gmd:keyword/gco:CharacterString |
/*/TemporalKeywords/Keyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='temporal']/gmd:keyword/gco:CharacterString |
/*/ArchiveCenter | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='dataCenter']/gmd:keyword/gco:CharacterString |
/*/Campaigns/Campaign/ShortName > /*/Campaigns/Campaign/LongName | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='project']/gmd:keyword/gco:CharacterString |
/*/Platforms/Platform/ShortName > /*/Platforms/Platform/LongName | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString |
/*/Platforms/Platform/Instruments/Instrument/ShortName > | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='instrument']/gmd:keyword/gco:CharacterString |
/*/Platforms/Platform/Instruments/Instrument/LongName | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString |
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xPath Note: The xPaths included in this table use several wildcards. // means any path, so //gmd:CI_ResponsibleParty indicates a gmd:CI_ResponsibleParty anywhere in an XML file. /*/ indicates a single level with several possible elements. This usually indicates one of several concrete realizations of an abstract object. For example /*/gmd:identificationInfo could be gmd:MD_Metadata/gmd:identificationInfo or gmi:MI_Metadata/gmd:identificationInfo and gmd:identificationInfo//*/gmd:descriptiveKeywords could be gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords or gmd:identificationInfo/srv:SV_ServiceIdentification/gmd:descriptiveKeywords. |
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