anchor.diff:  OGC:GML,http://www.opengis.net/gml,OGC Geography Markup Language,,gmd:MD_Format/gmd:name;gmd:applicationProfile,,data,@tomkralidis,Example
   WWW:LINK,http://www.w3.org/TR/xlink/,Web Address (URL),,dct:references/@scheme,,information,@tomkralidis @smrazgs,Indicates that XLINK properties are encoded as key-value pairs in content of a dct:references element to provide a machine actionable link. 
   WWW:WSDL,http://www.w3.org/TR/wsdl,Web Service Description Language XML document describing service operation,http://www.w3.org/TR/wsdl,gmd:applicationProfile,W3C,,@smrazgs,
  +WWW:SPARQL,http://www.w3.org/TR/rdf-sparql-query,SPARQL Query Language for RDF,http://www.w3.org/TR/rdf-sparql-query,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for a SPARQL endpoint"
   OpenSearch1.1,http://www.opensearch.org/Specifications/OpenSearch/1.1#OpenSearch_URL_template_syntax,OpenSearch template,http://www.opensearch.org/Specifications/OpenSearch/1.1#OpenSearch_URL_template_syntax,usgin:template;gmd:applicationProfile,OpenSearch.org,,@smrazgs,use to indicate link is a template conforming to the OpenSearch specification
   OpenSearch1.1:Description,http://www.opensearch.org/Specifications/OpenSearch/1.1#OpenSearch_description_document,OpenSearch description document,http://www.opensearch.org/Specifications/OpenSearch/1.1#OpenSearch_description_document,gmd:applicationProfile,OpenSearch.org,,@smrazgs,indicates a link to get an openSearch description document
   information,,link provides information about resource,,gmd:function,ISO TC211,,@smrazgs,function of link it to http:GET information about resource
  
positive.code: ISO 19115:2003/19139,,ISO 19115 metadata in ISO19139 encoding,,gmd:metadataStandardName,GeoNetwork,,@smrazgs,This is the CharacterString value used by Geonetwork OpenSource to identify ISO metadata record instances; apparently have to assume that its using the 2006 corrigendum with no specific profile conventions.
  ISO-USGIN,,USGIN-profile ISO 19115 metadata,http://repository.usgin.org/uri_gin/usgin/dlio/337,gmd:metadataStandardName,USGIN,,@smrazgs,This is the CharacterString Value mandated by the USGIN profile of ISO19115/19139 for instance documents to self-identify.  
  http,https://www.ietf.org/rfc/rfc2616,"Hypertext transfer Protocol, v1.1",https://www.ietf.org/rfc/rfc2616.txt,gmd:protocol,IETF,,@smrazgs,Use to indicate gmd:CI_OnlineResource URLs that are simple http links to a target resource representation for download; redundant as the URL prefix 'http:' conveys the same information.
  
negative.code: identifier,uri,label,url,target,owner,resource_type,registrant,comments
  OGC:CSW,http://www.opengis.net/def/serviceType/ogc/csw,OGC Catalogue Service for the Web,http://www.opengeospatial.org/standards/cat,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@tomkralidis,gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Catalog service for the web v2.0.2 endpoint (should use differnt protocol identifier if the endpoint is not v2.0.2; these are not yet defined here).  The gmd:function value in the CI_Online resource should be 'information' if the provided URL is a getCapabilities request. 
  OGC:SOS,http://www.opengis.net/def/serviceType/ogc/sos,OGC Sensor Observation Service,http://www.opengeospatial.org/standards/sos,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@tomkralidis,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Sensor Observation service v?? endpoint (should use differnt protocol identifier if the endpoint is not that version; these are not yet defined here).  The gmd:function value in the CI_Online resource should be 'information' if the provided URL is a getCapabilities request. Note that if the service offers multiple datasets in different offerings, the parameters necessary to access the correct offering should be specified in the gmd:CI_OnlineResource/gmd:description element; recommended practice is to use a JSON object with keys that are parameter names and values that are the necessary parameters."
  OGC:SPS,http://www.opengeospatial.org/standards/sps,OGC Sensor Planning Service,http://www.opengeospatial.org/standards/sps,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an Sensor Planning Service" 
  OGC:SAS,http://www.ogcnetwork.net/SAS,OGC Sensor Alert Service,http://www.ogcnetwork.net/SAS,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an Sensor Alert Service"
  OGC:WNS,http://www.ogcnetwork.net/WNS,OGC Web Notification Service,http://portal.opengeospatial.org/files/?artifact_id=1367,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an Web Notification Service" 
  OGC:WCS,http://www.opengis.net/def/serviceType/ogc/wcs,OGC Web Coverage Service,http://www.opengeospatial.org/standards/wcs,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@tomkralidis,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Web coverage service v?? endpoint (should use differnt protocol identifier if the endpoint is not that version; these are not yet defined here).  The gmd:function value in the CI_Online resource should be 'information' if the provided URL is a getCapabilities request. Note that if the service offers multiple datasets in different coverages, the parameters necessary to access the correct coverage should be specified in the gmd:CI_OnlineResource/gmd:description element; recommended practice is to use a JSON object with keys that are parameter names and values that are the necessary parameters."
  OGC:WFS,http://www.opengis.net/def/serviceType/ogc/wfs,OGC Web Feature Service,http://www.opengeospatial.org/standards/wfs,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@tomkralidis,gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Web Feature Service v?? endpoint (should use differnt protocol identifier if the endpoint is not that version; these are not yet defined here).  The gmd:function value in the CI_Online resource should be 'information' if the provided URL is a getCapabilities request. Note that if the service offers multiple datasets in different feature types the typeName parameter necessary to access the correct data should be specified in the gmd:CI_OnlineResource/gmd:description element; recommended practice is to use a JSON object with keys that are parameter names and values that are the necessary parameters.
  OGC:WMS,http://www.opengis.net/def/serviceType/ogc/wms,OGC Web Map Service,http://www.opengeospatial.org/standards/wms,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@tomkralidis,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Web Map Service v?? endpoint (should use differnt protocol identifier if the endpoint is not that version; these are not yet defined here).  The gmd:function value in the CI_Online resource should be 'information' if the provided URL is a getCapabilities request. Note that if the service offers multiple datasets in different map layers, the layers parameters necessary to access the correct data should be specified in the gmd:CI_OnlineResource/gmd:description element; recommended practice is to use a JSON object with keys that are parameter names and values that are the necessary parameters."
  OGC:WMTS,http://www.opengeospatial.org/standards/wmts,Web Map Tile Service,http://www.opengeospatial.org/standards/wmts,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Web Map Tile Service"
  OGC:WPS,http://www.opengis.net/def/serviceType/ogc/wps,OGC Web Processing Service,http://www.opengeospatial.org/standards/wps,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@tomkralidis,gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Web Processing Service v?? endpoint (should use differnt protocol identifier if the endpoint is not that version; these are not yet defined here).  The gmd:function value in the CI_Online resource should be 'information' if the provided URL is a getCapabilities request. Other parameters necessary to access the correct processing service should be specified in the gmd:CI_OnlineResource/gmd:description element; recommended practice is to use a JSON object with keys that are parameter names and values that are the necessary parameters.
  OGC:ODS,http://www.opengeospatial.org/standards/ols/ods,OGC-ODS OpenLS Directory Service,http://www.opengeospatial.org/standards/ols,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC OpenLS Directory Service" 
  OGC:OGS,http://www.opengeospatial.org/standards/ols/ogs,OGC-ODS OpenLS Gateway Service,http://www.opengeospatial.org/standards/ols,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC OpenLS Gateway Service"
  OGC:OUS,http://www.opengeospatial.org/standards/ols/ous,OGC-ODS OpenLS Utility Service,http://www.opengeospatial.org/standards/ols,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC OpenLS Utility Service" 
  OGC:OPS,http://www.opengeospatial.org/standards/ols/ops,OGC-ODS OpenLS Presentation Service,http://www.opengeospatial.org/standards/ols,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC OpenLS Presentation Service" 
  OGC:ORS,http://www.opengeospatial.org/standards/ols/ors,OGC-ODS OpenLS Route Service,http://www.opengeospatial.org/standards/ols,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC OpenLS Route Service"
  OGC:CT,http://www.opengeospatial.org/standards/ct,OGC Coordinate Transformation Service,http://www.opengeospatial.org/standards/ct,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Coordinate Transformation Service"
  OGC:WFS-G,http://www.opengeospatial.org/standards/wfs-g,Gazetteer Service Profile of the Web Feature Service Implementation Specification,http://portal.opengeospatial.org/files/?artifact_id=7175,srv:serviceType;gmd:protocol;usgin:overlayAPI,,service,@pvgenuchten,"gmd:protocol value that indicates CI_OnlineResource URL is for an OGC Gazetteer Service Profile of the Web Feature Service Implementation Specification"
  ESRI:ArcIMS,urn:x-esri:serviceType:ArcIMS,ESRI ArcIMS Service,,srv:serviceType;gmd:protocol;usgin:overlayAPI,Esri Inc.,service,@tomkralidis,gmd:protocol value that indicates CI_OnlineResource URL is for an ArcIMS endpoint. ArcIMS requests are tunneled via HTTP Get URL's
  ESRI:ArcGIS,urn:x-esri:serviceType:ArcGIS,ESRI ArcGIS Service,,srv:serviceType;gmd:protocol;usgin:overlayAPI,Esri Inc.,service,@tomkralidis,gmd:protocol value that indicates CI_OnlineResource URL is for an ESRI Map service endpoint. ESRI REST requests are tunneled via HTTP Get URL's
  ESRI:MPK,http://esriurl.com/mpk.xml,ArcGIS Map Package, http://esriurl.com/mpk.xml,gmd:MD_Format/gmd:name;gmd:applicationProfile,Esri Inc.,data,@mhogeweg,"Example URI for ArcGIS Map Package. Mpk is a file format. A map package contains a map document (.mxd) and the data referenced by the layers it contains, packaged into one convenient, portable file."
  