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iso2geoBL.xsl
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<!--
iso2geoBl.xsl - Transformation from ISO 19139 XML into GeoBlacklight solr json
-->
<xsl:stylesheet
xmlns="http://www.loc.gov/mods/v3"
xmlns:gco="http://www.isotc211.org/2005/gco"
xmlns:gmi="http://www.isotc211.org/2005/gmi"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:gml="http://www.opengis.net/gml"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0" exclude-result-prefixes="gml gmd gco gmi xsl">
<xsl:output method="text" version="1.0" omit-xml-declaration="yes" indent="no" media-type="application/json"/>
<xsl:strip-space elements="*"/>
<xsl:param name="zipName" select="'data.zip'"/>
<xsl:template match="/">
<!-- bounding box -->
<xsl:variable name="upperCorner">
<xsl:value-of select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal)"/>
<xsl:text> </xsl:text>
<xsl:value-of select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal)"/>
</xsl:variable>
<xsl:variable name="lowerCorner">
<xsl:value-of select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal)"/>
<xsl:text> </xsl:text>
<xsl:value-of select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal)"/>
</xsl:variable>
<xsl:variable name="x2" select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal)"/><!-- E -->
<xsl:variable name="x1" select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal)"/><!-- W -->
<xsl:variable name="y2" select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal)"/><!-- N -->
<xsl:variable name="y1" select="number(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal)"/><!-- S -->
<xsl:variable name="format">
<xsl:choose>
<xsl:when test="contains(gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributionFormat/gmd:MD_Format/gmd:name, 'Raster Dataset')">
<xsl:text>image/tiff</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributionFormat/gmd:MD_Format/gmd:name, 'GeoTIFF')">
<xsl:text>image/tiff</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributionFormat/gmd:MD_Format/gmd:name, 'Shapefile')">
<xsl:text>application/x-esri-shapefile</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:spatialRepresentationType/gmd:MD_SpatialRepresentationTypeCode/@codeListValue='vector'">
<xsl:text>application/x-esri-shapefile</xsl:text>
</xsl:when>
</xsl:choose>
</xsl:variable>
<xsl:variable name="uuid">
<xsl:value-of select="gmd:MD_Metadata/gmd:fileIdentifier"/>
</xsl:variable>
<xsl:variable name="identifier">
<xsl:choose>
<!-- for Stanford URIs -->
<xsl:when test="contains($uuid, 'purl')">
<xsl:value-of select="substring($uuid, string-length($uuid)-10)"/>
</xsl:when>
<!-- all others -->
<xsl:otherwise>
<xsl:value-of select="$uuid"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:text>{</xsl:text>
<xsl:text>"geoblacklight_version": "1.0",</xsl:text>
<xsl:text>"uuid": "</xsl:text><xsl:value-of select="$uuid"/><xsl:text>",</xsl:text>
<xsl:text>"dc_identifier_s": "</xsl:text><xsl:value-of select="$uuid"/><xsl:text>",</xsl:text>
<xsl:text>"dc_title_s": "</xsl:text><xsl:value-of select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:title"/><xsl:text>",</xsl:text>
<xsl:text>"dc_description_s": "</xsl:text><xsl:value-of select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:abstract"/><xsl:text>",</xsl:text>
<xsl:text>"dc_rights_s": "</xsl:text>
<xsl:choose>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:accessConstraints/gmd:MD_RestrictionCode[@codeListValue='restricted']">
<xsl:text>Restricted</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:accessConstraints/gmd:MD_RestrictionCode, 'restricted')">
<xsl:text>Restricted</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:useConstraints/gmd:MD_RestrictionCode[@codeListValue='restricted']">
<xsl:text>Restricted</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:useConstraints/gmd:MD_RestrictionCode, 'restricted')">
<xsl:text>Restricted</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:otherConstraints">
<xsl:choose>
<xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:otherConstraints, 'restricted')">
<xsl:text>Restricted</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:otherConstraints, 'public domain')">
<xsl:text>Public</xsl:text>
</xsl:when>
<!-- <xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:otherConstraints, $institution)">
<xsl:text>Restricted</xsl:text>
</xsl:when> -->
</xsl:choose>
</xsl:when>
<xsl:otherwise>
<xsl:text>Public</xsl:text>
</xsl:otherwise>
</xsl:choose><xsl:text>",</xsl:text>
<xsl:text>"dct_provenance_s": "</xsl:text>
<xsl:text>NYU",</xsl:text>
<xsl:text>"layer_id_s": "</xsl:text>
<xsl:value-of select="$identifier"/>
<xsl:text>",</xsl:text>
<xsl:text>"layer_geom_type_s": "</xsl:text>
<xsl:choose>
<xsl:when test="gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects/gmd:MD_GeometricObjects/gmd:geometricObjectType/gmd:MD_GeometricObjectTypeCode[@codeListValue='surface']">
<xsl:text>Polygon</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects/gmd:MD_GeometricObjects/gmd:geometricObjectType/gmd:MD_GeometricObjectTypeCode, 'surface')">
<xsl:text>Polygon</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects/gmd:MD_GeometricObjects/gmd:geometricObjectType/gmd:MD_GeometricObjectTypeCode[@codeListValue='curve']">
<xsl:text>Line</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects/gmd:MD_GeometricObjects/gmd:geometricObjectType/gmd:MD_GeometricObjectTypeCode, 'curve')">
<xsl:text>Line</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects/gmd:MD_GeometricObjects/gmd:geometricObjectType/gmd:MD_GeometricObjectTypeCode[@codeListValue='point']">
<xsl:text>Point</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects/gmd:MD_GeometricObjects/gmd:geometricObjectType/gmd:MD_GeometricObjectTypeCode, 'point')">
<xsl:text>Point</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:spatialRepresentationType/gmd:MD_SpatialRepresentationTypeCode, 'grid')">
<xsl:text>Raster</xsl:text>
</xsl:when>
</xsl:choose>
<xsl:text>",</xsl:text>
<xsl:text>"layer_slug_s": "</xsl:text>
<xsl:value-of select="$identifier"/>
<xsl:text>",</xsl:text>
<xsl:choose>
<xsl:when test="contains(gmd:MD_Metadata/gmd:dateStamp, 'T')">
<xsl:text>"layer_modified_dt": "</xsl:text>
<xsl:value-of select="substring-before(gmd:MD_Metadata/gmd:dateStamp, 'T')"/>
<xsl:text>",</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:dateStamp">
<xsl:text>"layer_modified_dt": "</xsl:text>
<xsl:value-of select="gmd:MD_Metadata/gmd:dateStamp"/>
<xsl:text>",</xsl:text>
</xsl:when>
</xsl:choose>
<xsl:if test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:role/gmd:CI_RoleCode[@codeListValue='originator']">
<xsl:text>"dc_creator_sm": [</xsl:text>
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:role/gmd:CI_RoleCode[@codeListValue='originator']">
<xsl:if test="ancestor-or-self::*/gmd:organisationName">
<xsl:text>"</xsl:text>
<xsl:value-of select="ancestor-or-self::*/gmd:organisationName"/>
<xsl:text>"</xsl:text>
<xsl:if test="position() != last()">
<xsl:text>,</xsl:text>
</xsl:if>
</xsl:if>
<xsl:if test="ancestor-or-self::*/gmd:individualName">
<xsl:text>"</xsl:text>
<xsl:value-of select="ancestor-or-self::*/gmd:individualName"/>
<xsl:text>"</xsl:text>
<xsl:if test="position() != last()">
<xsl:text>,</xsl:text>
</xsl:if>
</xsl:if>
</xsl:for-each>
<xsl:text>],</xsl:text>
</xsl:if>
<xsl:if test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:role/gmd:CI_RoleCode[@codeListValue='publisher']">
<xsl:text>"dc_publisher_sm": [</xsl:text>
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:role/gmd:CI_RoleCode[@codeListValue='publisher']">
<xsl:if test="ancestor-or-self::*/gmd:organisationName">
<xsl:text>"</xsl:text>
<xsl:value-of select="ancestor-or-self::*/gmd:organisationName"/>
<xsl:text>"</xsl:text>
<xsl:if test="position() != last()">
<xsl:text>,</xsl:text>
</xsl:if>
</xsl:if>
<xsl:if test="ancestor-or-self::*/gmd:individualName">
<xsl:text>"</xsl:text>
<xsl:value-of select="ancestor-or-self::*/gmd:individualName"/>
<xsl:text>"</xsl:text>
<xsl:if test="position() != last()">
<xsl:text>,</xsl:text>
</xsl:if>
</xsl:if>
</xsl:for-each>
<xsl:text>],</xsl:text>
</xsl:if>
<xsl:text>"dc_format_s": "</xsl:text><xsl:value-of select="$format"/><xsl:text>",</xsl:text>
<!-- TODO: add inputs for other languages
<field name="dc_language_s"> -->
<xsl:text>"dc_language_s": "English",</xsl:text>
<!-- </field> -->
<!-- from DCMI type vocabulary -->
<xsl:choose>
<xsl:when test="contains(gmd:MD_Metadata/gmd:hierarchyLevelName/gco:CharacterString, 'dataset')">
<xsl:text>"dc_type_s": "Dataset",</xsl:text>
</xsl:when>
<xsl:when test="contains(gmd:MD_Metadata/gmd:hierarchyLevelName/gco:CharacterString, 'service')">
<xsl:text>"dc_type_s": "Service",</xsl:text>
</xsl:when>
</xsl:choose>
<xsl:if test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:topicCategory/gmd:MD_TopicCategoryCode">
<xsl:text>"dc_subject_sm": [</xsl:text>
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:topicCategory/gmd:MD_TopicCategoryCode">
<xsl:text>"</xsl:text>
<xsl:value-of select="."/>
<xsl:text>"</xsl:text>
<xsl:text>,</xsl:text>
</xsl:for-each>
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords">
<xsl:if test="gmd:type/gmd:MD_KeywordTypeCode[@codeListValue='theme']">
<xsl:for-each select="gmd:keyword">
<xsl:text>"</xsl:text>
<xsl:value-of select="."/>
<xsl:text>"</xsl:text>
<xsl:if test="position() != last()">
<xsl:text>,</xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:if>
</xsl:for-each>
<xsl:text>],</xsl:text>
</xsl:if>
<xsl:if test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:type/gmd:MD_KeywordTypeCode[@codeListValue='place']">
<xsl:text>"dc_spatial_sm": [</xsl:text>
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:type/gmd:MD_KeywordTypeCode[@codeListValue='place']">
<xsl:for-each select="ancestor-or-self::*/gmd:keyword">
<xsl:text>"</xsl:text>
<xsl:value-of select="."/>
<xsl:text>"</xsl:text>
<xsl:if test="position() != last()">
<xsl:text>,</xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:for-each>
<xsl:text>],</xsl:text>
</xsl:if>
<xsl:choose>
<xsl:when test="contains(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:DateTime, 'T')">
<xsl:text>"dct_issued_s": "</xsl:text>
<xsl:value-of select="substring-before(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:DateTime,'T')"/>
<xsl:text>",</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:DateTime">
<xsl:text>"dct_issued_s": "</xsl:text>
<xsl:value-of select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:DateTime"/>
<xsl:text>",</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:Date">
<xsl:text>"dct_issued_s": "</xsl:text>
<xsl:value-of select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:Date"/>
<xsl:text>",</xsl:text>
</xsl:when>
<!-- <xsl:otherwise>unknown</xsl:otherwise> -->
</xsl:choose>
<!-- content date: range YYYY-YYYY if dates differ -->
<xsl:choose>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition/text() != ''">
<xsl:text>"dct_temporal_sm": "</xsl:text>
<xsl:value-of select="substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition, 1,4)"/>
<xsl:if test="substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:endPosition, 1,4) != substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition,1,4)">
<xsl:text>-</xsl:text>
<xsl:value-of select="substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:endPosition, 1,4)"/>
</xsl:if>
<xsl:text>",</xsl:text>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimeInstant">
<xsl:text>"dct_temporal_sm": "</xsl:text>
<xsl:value-of select="substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimeInstant, 1,4)"/>
<xsl:text>",</xsl:text>
</xsl:when>
</xsl:choose>
<!-- collection -->
<xsl:choose>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:aggregationInfo/gmd:MD_AggregateInformation/gmd:associationType/gmd:DS_AssociationTypeCode[@codeListValue='largerWorkCitation']">
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:aggregationInfo/gmd:MD_AggregateInformation/gmd:associationType/gmd:DS_AssociationTypeCode[@codeListValue='largerWorkCitation']">
<xsl:text>"dct_isPartOf_sm": "</xsl:text>
<xsl:value-of select="ancestor-or-self::*/gmd:aggregateDataSetName/gmd:CI_Citation/gmd:title"/>
<xsl:text>",</xsl:text>
</xsl:for-each>
</xsl:when>
<!-- <xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:collectiveTitle">
<xsl:for-each select="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:collectiveTitle">
<field name="dct_isPartOf_sm">
<xsl:value-of select="."/>
</field>
</xsl:for-each>
</xsl:when> -->
</xsl:choose>
<xsl:text>"solr_geom": "ENVELOPE(</xsl:text>
<xsl:value-of select="$x1"/>
<xsl:text>, </xsl:text>
<xsl:value-of select="$x2"/>
<xsl:text>, </xsl:text>
<xsl:value-of select="$y2"/>
<xsl:text>, </xsl:text>
<xsl:value-of select="$y1"/>
<xsl:text>)",</xsl:text>
<!-- content date: singular, or beginning date of range: YYYY -->
<xsl:choose>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition/text() != ''">
<xsl:text>"solr_year_i": </xsl:text>
<xsl:value-of select="substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition, 1,4)"/>
</xsl:when>
<xsl:when test="gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimeInstant">
<xsl:text>"solr_year_i": </xsl:text>
<xsl:value-of select="substring(gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimeInstant, 1,4)"/>
</xsl:when>
</xsl:choose>
<xsl:text>}</xsl:text>
</xsl:template>
</xsl:stylesheet>