add relations to metadata element

Author: pvgenuchten

docs/content/reference/mcf.md

@@ -130,6 +130,7 @@ language|Mandatory|primary language used for documenting metadata, the metadata
 language_alternate|Optional|alternate language used for documenting metadata|en|ISO 19115:2003 Annex J
 charset|Mandatory|full name of the character coding standard used for the metadata set|utf8|ISO 19115:2003 Section B.2.1
 parentidentifier|Optional|file identifier of the metadata to which this metadata is a subset|11800c2c-e6b9-11df-b9ae-0014c2c33ebe|ISO 19115:2003 Section B.2.1
+relations|Optional|relations between this record and other records, identified by identifier or uri|11800c2c-e6b9-11df-b9ae-0014c2c33ebe|ISO 19115:2003 Section B.2.2.7
 hierarchylevel|Mandatory|level to which the metadata applies (must be one of 'series', 'software', 'featureType', 'model', 'collectionHardware', 'collectionSession', 'nonGeographicDataset', 'propertyType', 'fieldSession', 'dataset', 'service', 'attribute', 'attributeType', 'tile', 'feature', 'dimensionGroup'|dataset|ISO 19115:2003 Section B.2.1
 datestamp|Mandatory|date that the metadata was created, pygeometa supports specifying the $date$ or $datetime$ variable to update the date value at run time|2000-11-11 or 2000-01-12T11:11:11Z|ISO 19115:2003 Section B.2.1
 dataseturi|Optional|Uniformed Resource Identifier (URI) of the dataset to which the metadata applies|`urn:x-wmo:md:int.wmo.wis::http://geo.woudc.org/def/data/uv-radiation/uv-irradiance`|ISO 19115:2003 Section B.2.1

pygeometa/schemas/mcf/core.yaml

@@ -34,6 +34,11 @@ properties:
             parentidentifier:
                 type: string
                 description: file identifier of the metadata to which this metadata is a subset
+            relations:
+                type: array
+                description: relations between this record and other records
+                items:
+                    $ref: '#/definitions/relation'
             hierarchylevel:
                 type: string
                 description: level to which the metadata applies
@@ -705,6 +710,47 @@ definitions:
                   '.*_\w{2}$':
                       allOf:
                           - type: string
+    relation:
+        type: object
+        properties:
+            identifier:
+                type: string
+                description: A reference to other record, either by UUID or URI
+            hierarchylevel:
+                type: string
+                description: The type of the linked resource
+                enum:
+                    - series
+                    - software
+                    - featureType
+                    - model
+                    - collectionHardware
+                    - collectionSession
+                    - nonGeographicDataset
+                    - propertyType
+                    - fieldSession
+                    - dataset
+                    - service
+                    - attribute
+                    - attributeType
+                    - tile
+                    - feature
+                    - dimensionGroup
+            relationType:
+                type: string
+                description: The type of relation to the linked resource
+                enum: 
+                    - crossReference
+                    - largerWorkCitation
+                    - partOfSeamlessDatabase
+                    - source
+                    - uses
+                    - version
+                    - part
+                    - supplement
+                    - reference
+        required:
+            - identifier
     date_or_datetime_string:
         anyOf:
             - type: string

sample.yml

@@ -7,6 +7,10 @@ metadata:
     language_alternate: fr
     charset: utf8
     parentidentifier: someparentid
+    relations:
+        - identifier: some-related-identifier
+          hierarchylevel: dataset
+          relationType: source 
     hierarchylevel: dataset
     datestamp: 2014-11-11
     dataseturi: http://some/minted/uri