12.6.6 ChannelIndex

A read-only class that is the union of those channel indexes that are shared by all channels in the channel set.

Table 12.6.6-1 Attributes
Name	Type	Notes
DatumReference	String64	For depth indexes, this contains the UID of the datum, in a channel's Well object, to which all of the index values are referenced.
Direction	IndexDirection	The direction of the index, either increasing or decreasing. Index direction may not change within the life of a channel.
IndexType	ChannelIndexType	The type of index (time, depth, etc.).
Mnemonic	String64	The mnemonic for the index.
Uom	UnitOfMeasureExt	The unit of measure of the index. Must be one of the units allowed for the specified IndexType (i.e., time or distance).

Table 12.6.6-2 Associations
Association	Notes
From: ChannelIndex. To: IndexDirection Dependency
From: ChannelIndex. To: ChannelIndexType Dependency
From: Channel.Index 1..*To: ChannelIndex Association
From: ChannelSet.Index 1..*To: ChannelIndex Association	One or more indexes for the channel. The first is required, and is referred to as the primary index. All channels in the channel set must be based on a 'compatible' index (all time or all depth) and the same datum.