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Component Tags

Mapping Services allows the physical representation to be described by defining, for each unique component name referenced in a map, a unique tag (alternatively known as an identifier, or key), which is an integer that can be placed within the data to identify a logical component. If the component is constructed, the way in which its contents are represented can also be defined. This ensures that for a constructed component, each of the separate items within it can be isolated according to a common access technique and each can be independently identified by their unique tag values.