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= keyword for category

== Part 1

WMO Core Metadata Profile places the following additional restrictions on ISO 19115:2003/Cor. 1:2006:

* 8.2.1 Each WIS Discovery Metadata record shall include at least one keyword from the WMO_CategoryCode code list.
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* 8.2.2 Keywords from WMO_CategoryCode code list shall be defined as keyword type “theme”.
* 8.2.3 All keywords sourced from a particular keyword thesaurus shall be grouped into a single instance of the MD_Keywords class.
* 8.2.4 Each WIS Discovery Metadata record describing geographic data shall include the description of at least one geographic bounding box defining the spatial extent of the data.

A new Code List Dictionary is published as part of this specification defining the set of permissible values for WMO_CategoryCode (see Part 2, Table 16). Keywords from WMO_CategoryCode shall be of type ‘theme’.

== Part 2

= keyword for distribution

DESCRIPTION OF DATA FOR GLOBAL EXCHANGE WITHIN WIS
Within the WIS, it is important for GISCs to be able to identify which data are published for global exchange. This determines whether the data are incorporated into the GISC cache. The WIS Discovery Metadata record describing a given dataset may identify whether that dataset is published for global exchange within the WIS.
Identifying the scope of distribution
The scope of distribution for a dataset (e.g. whether it is published for global exchange within the WIS) may be specified using a keyword:
・ /gmd:MD_Metadata/gmd:identificationInfo//gmd:descriptiveKeywords//gmd:keyword
The semantics of a keyword are inferred from a specified keyword thesaurus. The thesaurus relating to a particular keyword may be cited using the following element:
・ /gmd:MD_Metadata/gmd:identificationInfo//gmd:descriptiveKeywords//gmd:thesaurusName
The scope of distribution for data within WIS shall be expressed using the following controlled vocabulary: "GlobalExchange", “RegionalExchange” and “OriginatingCentre”.
A new Code List Dictionary is published as part of this specification defining the set of permissible values for specifying the scope of distribution within the WIS: WMO_DistributionScopeCode; Part 2. Table 17 refers.
The type of keyword may be specified using the following element:
・ /gmd:MD_Metadata/gmd:identificationInfo//gmd:descriptiveKeywords//gmd:type
The keyword type associated with WMO_DistributionScopeCode thesaurus shall be ‘dataCentre’. Keyword type ‘dataCentre’ is taken from the MD_KeywordTypeCode class described in ISO/DIS 19115-1:2013.
WMO Core Metadata Profile places the following additional restriction on ISO 19115:2003/Cor. 1:2006:
9.1.1 A WIS Discovery Metadata record describing data for global exchange via the WIS shall indicate the scope of distribution using the keyword “GlobalExchange” of type “dataCentre” from thesaurus WMO_DistributionScopeCode.


Identifiers for metadata describing data published for global exchange

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