This XML schema defines the format of the CDB Feature Data Dictionary. CDB is an OGC Standard. Copyright (c) 2016 Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/. This element represents the CDB Feature Data Dictionary root element. It has a version number and the list of all the categories. Validate that all subcategory codes are unique. Validate that all category codes are unique. This element represents a Category. It has a code attribute, a label and a list of subcategories. Validate that all feature types are unique. This element represents a Subcategory. It has a code attribute, a label and a list of feature types. Validate that all subcodes are unique. This element represents a Feature_Type. It has a code attribute, a label and a list of subcodes. This element represents a Subcode. It has a code attribute, a label, a concept definition, a recommended dataset component and an origin. This attribute represents the code of the category or subcategory. This attribute represents the feature code and subcode. This attribute represents the Label. It is a meaningful name to the code attribute. This attribute represents the version number of this file. It has two components: major.minor.