Difference between revisions of "ACDD Variable Attributes Recommendations"

From Earth Science Information Partners (ESIP)
(<div id="ACDD_Usability"> updated)
Line 2: Line 2:
 
==ACDD Variable Attributes for Usability - Highly Recommended==
 
==ACDD Variable Attributes for Usability - Highly Recommended==
 
The following NetCDF Attribute Convention for Data Discovery variable attributes are highly recommended for data usability.
 
The following NetCDF Attribute Convention for Data Discovery variable attributes are highly recommended for data usability.
<i xmlns:xsl="http://www.w3.org/1999/XSL/Transform">Source: </i> [http://wiki.esipfed.org/index.php/Attribute_Convention_for_Data_Discovery#Highly_Recommended_Variable_Attributes ACDD Release 1.1]<table xmlns:xsl="http://www.w3.org/1999/XSL/Transform" width="95%" border="1" cellpadding="3" cellspacing="3" style="border-collapse: collapse;" id="ACDD_Usability"><tr><th width="15%">Concept</th><th width="25%">Description</th><th width="60%">Dialect (Fit) Paths</th></tr><tr><td>[[Concepts_Glossary#Parameter_Name_(Standard)|Parameter Name (Standard)]]</td><td>The name of a parameter included in the resource from a standard vocabulary.</td><td style="word-break:break-all;"><b>ISO-1</b> /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:attribute/*/mrc:name/mcc:MD_Identifier/mcc:code/gco:CharacterString<br><b>netCDF</b> /nc:netcdf/nc:variable/nc:attribute[@nc:name='standard_name']/@nc:value<br></td></tr><tr><td>[[Concepts_Glossary#Standard_Name_Vocabulary|Standard Name Vocabulary]]</td><td>The name of the shared vocabulary from which variable standard names are taken.</td><td style="word-break:break-all;"><b>ISO</b> /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString<br><b>ISO-1</b> /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:thesaurusName/cit:CI_Citation/cit:title/gco:CharacterString<br><b>THREDDS</b> //thredds:dataset/thredds:dataset/thredds:variables/@vocabulary<br><b>netCDF</b> /nc:netcdf/nc:variable/attribute[@nc:name=standard_name_vocabulary]/@nc:value<br></td></tr><tr><td>[[Concepts_Glossary#Units|Units]]</td><td>The units of the variables data values.</td><td style="word-break:break-all;"><b>ISO</b> /gmi:MI_Metadata/gmd:contentInfo/gmi:MI_CoverageDescription/gmd:dimension/gmd:MD_Band/gmd:units<br><b>ISO-1</b> /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:attribute/mrc:MD_SampleDimension/mrc:units<br><b>netCDF</b> metadata/variables/variable@units/@nc:value<br></td></tr><tr><td>[[Concepts_Glossary#Coverage_Content_Type|Coverage Content Type]]</td><td>An ISO 19115-1 code to indicate the source of the data</td><td style="word-break:break-all;"><b>ISO</b> /gmd:MD_Metadata/gmd:contentInfo/gmd:MD_CoverageDescription/gmd:contentType/gmd:MD_CoverageContentTypeCode<br><b>ISO-1</b> /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:contentType/mrc:MD_CoverageContentTypeCode<br></td></tr></table></div>
+
<i xmlns:xsl="http://www.w3.org/1999/XSL/Transform">Source: </i> [http://wiki.esipfed.org/index.php/Attribute_Convention_for_Data_Discovery#Highly_Recommended_Variable_Attributes ACDD Release 1.1]<table xmlns:xsl="http://www.w3.org/1999/XSL/Transform" width="95%" border="1" cellpadding="3" cellspacing="3" style="border-collapse: collapse;" id="ACDD_Usability"><tr><th width="15%">Concept</th><th width="25%">Description</th><th width="60%">Dialect (Fit) Paths</th></tr><tr><td>[[Concepts_Glossary#Parameter_Name_(Standard)|Parameter Name (Standard)]]</td><td>The name of a parameter included in the resource from a standard vocabulary.</td><td style="word-break:break-all;"><b>ISO-1</b> /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:attribute/*/mrc:name/mcc:MD_Identifier/mcc:code/gco:CharacterString<br><b>netCDF</b> /nc:netcdf/nc:variable/nc:attribute[@nc:name='standard_name']/@nc:value<br></td></tr><tr><td>[[Concepts_Glossary#Standard_Name_Vocabulary|Standard Name Vocabulary]]</td><td>The name of the shared vocabulary from which variable standard names are taken.</td><td style="word-break:break-all;"><b>ISO</b> /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString<br><b>ISO-1</b> /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:thesaurusName/cit:CI_Citation/cit:title/gco:CharacterString<br><b>THREDDS</b> //thredds:dataset/thredds:dataset/thredds:variables/@vocabulary<br><b>netCDF</b> /nc:netcdf/nc:variable/attribute[@nc:name=standard_name_vocabulary]/@nc:value<br></td></tr><tr><td>[[Concepts_Glossary#Units|Units]]</td><td>The units of the variables data values.</td><td style="word-break:break-all;"><b>ISO</b> /gmi:MI_Metadata/gmd:contentInfo/gmi:MI_CoverageDescription/gmd:dimension/gmd:MD_Band/gmd:units<br><b>ISO-1</b> /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:attribute/mrc:MD_SampleDimension/mrc:units<br><b>netCDF</b> metadata/variables/variable@units/@nc:value<br></td></tr><tr><td>[[Concepts_Glossary#Coverage_Content_Type|Coverage Content Type]]</td><td>The coverage content type is an item from an ISO 19115 shared vocabulary describing the basic content type the record contains. These content types are: image, thematicClassification, physicalMeasurement, auxiliaryInformation, qualityInformation, referenceInformation, modelResult</td><td style="word-break:break-all;"><b>ISO</b> /*/gmd:contentInfo/gmd:MD_CoverageDescription/gmd:contentType/gmd:MD_CoverageContentTypeCode<br><b>ISO-1</b> /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:contentType/mrc:MD_CoverageContentTypeCode<br><b>netCDF</b> /nc:netcdf/nc:variable/nc:attribute[@nc:name=coverage_content_type]/@nc:value<br></td></tr></table></div>
 
''xPath Note:'' The xPaths included in this table use several wildcards. // means
 
''xPath Note:'' The xPaths included in this table use several wildcards. // means
 
any path, so //gmd:CI_ResponsibleParty indicates a gmd:CI_ResponsibleParty anywhere
 
any path, so //gmd:CI_ResponsibleParty indicates a gmd:CI_ResponsibleParty anywhere

Revision as of 03:17, November 12, 2015

ACDD Variable Attributes for Usability - Highly Recommended

The following NetCDF Attribute Convention for Data Discovery variable attributes are highly recommended for data usability.

Source: ACDD Release 1.1
ConceptDescriptionDialect (Fit) Paths
Parameter Name (Standard)The name of a parameter included in the resource from a standard vocabulary.ISO-1 /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:attribute/*/mrc:name/mcc:MD_Identifier/mcc:code/gco:CharacterString
netCDF /nc:netcdf/nc:variable/nc:attribute[@nc:name='standard_name']/@nc:value
Standard Name VocabularyThe name of the shared vocabulary from which variable standard names are taken.ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:thesaurusName/cit:CI_Citation/cit:title/gco:CharacterString
THREDDS //thredds:dataset/thredds:dataset/thredds:variables/@vocabulary
netCDF /nc:netcdf/nc:variable/attribute[@nc:name=standard_name_vocabulary]/@nc:value
UnitsThe units of the variables data values.ISO /gmi:MI_Metadata/gmd:contentInfo/gmi:MI_CoverageDescription/gmd:dimension/gmd:MD_Band/gmd:units
ISO-1 /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:attribute/mrc:MD_SampleDimension/mrc:units
netCDF metadata/variables/variable@units/@nc:value
Coverage Content TypeThe coverage content type is an item from an ISO 19115 shared vocabulary describing the basic content type the record contains. These content types are: image, thematicClassification, physicalMeasurement, auxiliaryInformation, qualityInformation, referenceInformation, modelResultISO /*/gmd:contentInfo/gmd:MD_CoverageDescription/gmd:contentType/gmd:MD_CoverageContentTypeCode
ISO-1 /mdb:MD_Metadata/mdb:contentInfo/mrc:MD_CoverageDescription/mrc:attributeGroup/mrc:MD_AttributeGroup/mrc:contentType/mrc:MD_CoverageContentTypeCode
netCDF /nc:netcdf/nc:variable/nc:attribute[@nc:name=coverage_content_type]/@nc:value

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. Fit: The fit of the dialect path with the concept is estimated on a scale of 1 = excellent two-way fit, 2 = one-way fit or some other problem, 3 - extension required.


Data Accessibility/Usability