12.6.9 ChannelSetMetadata

Topic Version	1	Published	11/11/2016	Topic Change History
For Standard	WITSML v2.0
Type:	Class		Stereotype:	«XSDgroup»

Common metadata across all channel objects.

Table 12.6.9-1 Attributes
Name	Type	Notes
ChannelClass	PropertyKind	A mandatory value categorizing a log channel. The classification system used in WITSML is the one from the PWLS group.
ChannelState	ChannelState	Defines where the channel gets its data from, e.g., calculated from another source, or from archive, or raw real-time, etc.
Derivation	ChannelDerivation	Indicates that the channel is derived from one or more other channels.
EndIndex	AbstractIndexValue	When the log header defines the direction as: "Increasing", the endIndex is the ending (maximum) index value at which the last non-null data point is located. “Decreasing”, the endIndex is the ending (minimum) index value at which the last non-null data point is located.
LoggingCompanyCode	String64	The RP66 organization code assigned to a logging company. The list is available at http://www.energistics.org/geosciences/geology-standards/rp66-organization-codes
LoggingCompanyName	String64	Name of the logging company.
LoggingMethod	LoggingMethod	Defines where the log channel gets its data from: LWD, MWD, wireline; or whether it is computed, etc.
NominalHoleSize	LengthMeasureExt	The nominal hole size (typically the bit size) at the time the measurement tool was in the hole. The size is "nominal" to indicate that this is not the result of a caliper reading or other direct measurement of the hole size, but is just a name used to refer to the diameter. When more than one diameter holes are being drilled at the same time (e.g., where a reamer is behind the bit), this diameter is the one that was seen by the sensor that produced a particular log channel.
PassNumber	String64	The nominal pass number for the channel. No precise meaning is declared for this attribute but it is so commonly used that it must be included. The value here should match a wireline pass number for logging data.
RunNumber	String64	The nominal run number for the channel. No precise meaning is declared for this attribute but it is so commonly used that it must be included. The value here should match a bit run number for LWD data and a wireline run number for logging data.
StartIndex	AbstractIndexValue	When the log header defines the direction as: "Increasing", the startIndex is the starting (minimum) index value at which the first non-null data point is located. "Decreasing", the startIndex is the starting (maximum) index value at which the first non-null data point is located.
TimeDepth	String64	Use to indicate if this is a time or depth log.
ToolClass	String64	A value categorizing a logging tool. The classification system used in WITSML is the one from the PWLS group.
ToolName	String64	Name of the logging tool as given by the logging contractor.

Table 12.6.9-2 Associations
Association	Notes
From: ChannelSetMetadata. To: ChannelDerivation Dependency
From: ChannelSetMetadata. To: ChannelClassKindExt Dependency
From: ChannelSetMetadata. To: ChannelState Dependency
From: ChannelSetMetadata. To: LoggingMethod Dependency
From: Log.ChannelSetMetadata 1To: ChannelSetMetadata Association
From: ChannelSet.ChannelSetMetadata 1To: ChannelSetMetadata Association