Excerpt |
---|
I need attributes in my metadata that are specific to my product |
I need attributes in my metadata that are specific to my product
Overview
The ECHO and ISO metadata models both include the ability to add non-standard elements required by specific communities:
- ECHO additional attributes are parameters, also known as Product-Specific Attributes (PSAs), which further describe the data represented in each granule within a collection. These values are important search criteria for the granules.
- ISO 19115: This International Standard provides standard metadata and an associated structure that will serve a wide variety of digital geographic data. The definitions and domain values are intended to be sufficiently generic to satisfy the metadata needs of various disciplines. However, the very diversity of data means that generic metadata may not accommodate all applications. The standard provides rules for defining and applying additional metadata to better serve special user needs.
ECHO Additional Attributes have the following properties:
- Name – Unique name of the additional attribute.
- DataType – Data type of the additional attribute, chosen from the supported list of types.
- Description – A textual description of the attribute to help end users understand the purpose and data represented by the attribute.
- MeasurementResolution – Identifies the smallest unit increment to which the parameter value is measured.
- ParameterRangeBegin – Minimum value of all attribute values that will be provided by the collection or granules.
- ParameterRangeEnd – Maximum value of all attribute values that will be provided by the collection or granules.
- ParameterUnitsOfMeasure – Unit of measure for parameter (e.g. AVHRR: unit of geophysical parameter-units of geophysical parameter.)
- ParameterValueAccuracy – Estimate of the accuracy of the assignment of attribute value. This can be specified in percent or the unit with which the parameter is measured.
- ValueAccuracyExplanation – Defines the method used for determining the parameter value accuracy.
Recommendations for ISO 19115 and 19115-1
Section | |||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
The ECHO Collection Level Metadata includes 149 structured elements and over 300 Additional Attributes, so they are an important part of the existing metadata. There are two very broad groups of additional attributes. The first group represents concepts that are included in the ISO model. These are discussed in the Translation Details section below. Other additional attributes represent concepts that are not included in the ISO models. These are being added to the ISO metadata using model extensions. These need to be classified in order to attach them to the correct object in the ISO metadata. Preliminary categories and examples are shown here. These will almost certainly change as the categories are reviewed.
|
Implementation (XML)
<eos:AdditionalAttributes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://earthdata.nasa.gov/schema/eos ../schema.xsd" xmlns:eos="http://earthdata.nasa.gov/schema/eos" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:xlink="http://www.w3.org/1999/xlink"> <eos:EOS_AdditionalAttributes> <eos:additionalAttribute> <eos:EOS_AdditionalAttribute id="ID001" uuid="uuid1"> <eos:reference> <eos:EOS_AdditionalAttributeDescription id="ID002" uuid="uuid2"> <eos:type> <eos:EOS_AdditionalAttributeTypeCode codeList="http://earthdata.nasa.gov/metadata/resources/" codeListValue="additionalAttributeType">additionalAttributeType</eos:EOS_AdditionalAttributeTypeCode> </eos:type> <eos:identifier> <gmd:MD_Identifier id="ID003" uuid="uuid3"> <gmd:code> <gco:CharacterString>Unique identifier for the additionalAttribute</gco:CharacterString> </gmd:code> </gmd:MD_Identifier> </eos:identifier> <eos:name> <gco:CharacterString>Name of the additionalAttribute</gco:CharacterString> </eos:name> <eos:description> <gco:CharacterString>This attribute provides a description for the additionalAttribute.</gco:CharacterString> </eos:description> <eos:dataType> <eos:EOS_AdditionalAttributeDataTypeCode codeList="http://earthdata.nasa.gov/metadata/resources/" codeListValue="STRING">STRING</eos:EOS_AdditionalAttributeDataTypeCode> </eos:dataType> <eos:measurementResolution> <gco:CharacterString>This attribute will be used to identify the smallest unit increment to which the additionalAttribute value is measured.</gco:CharacterString> </eos:measurementResolution> <eos:parameterRangeBegin> <gco:CharacterString>This attribute provides the minimum value of additionalAttribute over whole collection.</gco:CharacterString> </eos:parameterRangeBegin> <eos:parameterRangeEnd> <gco:CharacterString>This attribute provides the maximum value of additionalAttribute over whole collection.</gco:CharacterString> </eos:parameterRangeEnd> <eos:parameterUnitsOfMeasure> <gco:CharacterString>The standard unit of measurement for a additionalAttribute.</gco:CharacterString> </eos:parameterUnitsOfMeasure> <eos:parameterValueAccuracy> <gco:CharacterString>An estimate of the accuracy of the assignment of attribute value.</gco:CharacterString> </eos:parameterValueAccuracy> <eos:valueAccuracyExplanation> <gco:CharacterString>This defines the method used for determining the parameter value accuracy that is given for this additionalAttribute.</gco:CharacterString> </eos:valueAccuracyExplanation> </eos:EOS_AdditionalAttributeDescription> </eos:reference> <eos:value> <gco:CharacterString>This attribute contains the value of the additionalAttribute for all granules across a given collection</gco:CharacterString> </eos:value> </eos:EOS_AdditionalAttribute> </eos:additionalAttribute> <eos:additionalAttribute xlink:href="http://componentService/uuid1" xlink:title="additionalAttribute with value"/> <eos:additionalAttribute> <eos:EOS_AdditionalAttribute> <eos:reference xlink:href="http://componentService/uuid2" xlink:title="additionalAttribute definition"/> <eos:value> <gco:CharacterString>This attribute contains the value of the additionalAttribute for all granules across a given collection</gco:CharacterString> </eos:value> </eos:EOS_AdditionalAttribute> </eos:additionalAttribute> </eos:EOS_AdditionalAttributes> </eos:AdditionalAttributes>
Usage
Type | ISO xPath |
citation.date | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date |
citation.identifier | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier |
citation.website | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty |
contentInformation | /gmi:MI_Metadata/gmd:contentInfo/gmd:MD_CoverageDescription/gmd:dimension/gmd:MD_Band/gmd:otherProperty/gco:Record/eos:AdditionalAttributes |
descriptiveKeyword | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString |
distribution.url | /gmi:MI_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorTransferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource |
distributionInformation | |
geographicIdentifier | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicDescription/gmd:geographicIdentifier/gmd:MD_Identifier |
instrumentInformation | /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:instrument/eos:EOS_Instrument/eos:otherProperty/gco:Record/eos:AdditionalAttributes |
lineage | |
processingInformation | /gmi:MI_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:processStep/gmi:LE_ProcessStep/gmi:processingInformation/eos:EOS_Processing/eos:otherProperty/gco:Record/eos:AdditionalAttributes/eos:AdditionalAttribute |
processStep | |
qualityInformation | /gmi:MI_Metadata/gmd:contentInfo/gmd:MD_CoverageDescription/gmd:dimension/gmd:MD_Band/gmd:otherProperty/gco:Record/eos:AdditionalAttributes |
resourceFormat | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceFormat/gmd:MD_Format |
Translation Details
Some existing AdditionalAttributes include information that fits in an existing ISO 19115 element without the NASA extensions. In this case, custom translations are required. The details of these translations are described here.
Content by Label | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
|
Contributors Summary |
---|
Hide comments |
---|