Documenting Keywords
Keywords are used by many metadata dialects in order to enable discipline specific descriptions of various kinds and discovery using those descriptions. Keywords usually come from shared vocabularies in order to encourage consistency across metadata collections. Keywords can support text searches as well as facet searches.
Crosswalks
| Concept | Description | Paths |
|---|---|---|
| Keyword Type | Methods used to group similar keywords | DIF /dif:DIF/dif:Related_URL/dif:URL_Content_Type/dif:Type > /dif:DIF/dif:Related_URL/dif:URL_Content_Type/dif:Subtype ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:type/gmd:MD_KeywordTypeCode OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Keywords/ows:Type |
| Keyword Vocabulary | If you are following a guideline or using a shared vocabulary for the words/phrases in your "keywords" attribute, put the name of that guideline here. Note: DIF and ECHO require that theme keywords come from the Global Change Master Directory list. |
ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Keywords/ows:Type='theme']/ows:Type/@codespace THREDDS //thredds:dataset/thredds:keyword/@vocabulary THREDDS /thredds:catalog/thredds:dataset/thredds:geospatialCoverage/thredds:name/@thredds:vocabulary netCDF /nc:netcdf/nc:attribute[@name=keyword_vocabulary] |
| Keyword | A word or phrase that describes some aspect of a resource. Can be one of several types. Note: The general identification keywords usually have a type of "theme" and are refered to as "theme keywords". Other types and vocabularies are used for other information. |
DIF /dif:DIF/dif:Parameters/dif:Category DIF /dif:DIF//dif:Parameters/dif:Topic DIF /dif:DIF//dif:Parameters/dif:Term DIF /dif:DIF//dif:Parameters/dif:Variable_Level_1 DIF /dif:DIF//dif:Parameters/dif:Variable_Level_2 DIF /dif:DIF//dif:Parameters/dif:Variable_Level_3 Dryad dcterms:subject ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:CategoryKeyword ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:TopicKeyword ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:TermKeyword ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:VariableLevel1Keyword/echo:Value ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:VariableLevel2Keyword/echo:Value ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:VariableLevel3Keyword ECHO /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:DetailedVariableKeyword ECS METADATA > COLLECTIONMETADATA > DisciplineTopicParameters > DisciplineTopicParametersContainer.ECSDisciplineKeyword > DisciplineTopicParametersContainer.ECSParameterKeyword > DisciplineTopicParametersContainer.ECSTermKeyword > DisciplineTopicParametersContainer.ECSTopicKeyword EML /eml:dataset/eml:keywordSet/eml:keyword/eml:text FGDC /fgdc:metadata/fgdc:idinfo/fgdc:keywords/fgdc:theme/fgdc:themekey ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Keywords[ows:Type='theme']/ows:Keyword THREDDS //thredds:metadata/thredds:keyword THREDDS //thredds:dataset/thredds:keyword netCDF /nc:netcdf/nc:attribute[@nc:name=keywords] |
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.
