Script Logical Records are Explicitly Formatted Logical Records
of Type SCRIPT that contain Objects that carry textual information.
Script Logical Records may contain Set Types Message
and Comment.
Message Objects carry messages generated by the interaction of the
operator with the system, for example, a "scroll"
of the logging session or informational messages concerning
events that occur during the session. It is up to the Producer
to determine which messages are of use to the Consumer.
Figure 6-1 defines the Attributes of a Message Object.
| Label
| Restrictions
| Comments
| TYPE
| C=1, R=IDENT
| 1
|
| TIME
| C=1
| 2
|
| BOREHOLE-DRIFT
| C=1
| 2
|
| VERTICAL-DEPTH
| C=1
| 2
|
| RADIAL-DRIFT
| C=1
| 2
|
| ANGULAR-DRIFT
| C=1
| 2
|
| TEXT
| R=ASCII
| 3
Figure 6-1. Attributes of Message Object
| |
Comments:
- 1.The TYPE Attribute specifies
the message type, indicating its source and purpose.
| Type Attribute Options
| Description
| Command
| Operator command
|
| Response
| Operator response
|
| System
| System message
| |
- 2.
The TIME, BOREHOLE-DRIFT, VERTICAL-DEPTH,
RADIAL-DRIFT, ANGULAR-DRIFT
Attributes specify, when applicable, the Locus of the Tool
Zero Point (see §4.1.8.1) at the time the message was issued.
The TIME Attribute represents either
an absolute date and time (if using Representation Code
DTIME) or an elapsed time from the file creation time specified
by the Creation-Time Attribute of the Origin Object.
- 3.The TEXT Attribute contains
the text of the message.
Comment Objects carry arbitrary textual information
considered interesting
to the Consumer, for example, a drilling report.
Figure 6-2 defines the Attributes of a Comment Object.
| Label
| Restrictions
| Comments
| TEXT
| R=ASCII
| 1
Figure 6-2. Attributes of Comment Object
| |
Comments:
- 1.The TEXT Attribute contains
arbitrary text.
Update Logical Records are Explicitly Formatted Logical Records
that contain information about changes that have been made
to Objects in the Static Information. Update Logical Records
occur irregularly, usually intermixed with Frame Logical
Records, and may require some recognition and action on
the part of the Consumer. Update Logical Records contain
the Set Type UPDATE.
Update Objects record changes, i.e., updates, that have been made
by the Producer to Objects in the Static Information. Use
of the Update Object provides both opportunities and obligations
for the Consumer. On the one hand, the information carried
by Update Objects provides more knowledge about the processes
associated with the data in the Logical File. On the other
hand, presence of certain Update Objects (for example, those
reflecting updates to Channel Objects) requires action by
the Consumer. Some actions, e.g., those associated with
reading Frames, must be taken by the Consumer. Other actions,
e.g., those associated with changes in Parameters, are at
the discretion of the Consumer, depending upon whether the
data is simply being "read" or whether it is being
used to recompute or display other data.
The Producer's obligation is to provide
Update Objects in such a way that the influence of the change
applies to data that follows the Update Object. That is,
changes must not be recorded "after the fact".
Nevertheless, the influence of changes may not apply immediately,
and most of the Attributes of the Update Object exist to
help the Consumer determine precisely at what point the
change takes effect.
Not all Objects may be updated. Those
Objects and their Attributes that are allowed to be updated
are listed in Appendix D. Attributes not listed in Appendix
D or not otherwise specified as changeable by this standard
must remain constant throughout a Logical File, and all
data that is influenced by any such Attribute must correspond
to a constant Value of that Attribute.
Figure 6-3 defines the Attributes of an Update Object.
| Label
| Restrictions
| Comments
| TIME
| C=1
| 1
|
| BOREHOLE-DRIFT
| C=1
| 1
|
| VERTICAL-DEPTH
| C=1
| 1
|
| RADIAL-DRIFT
| C=1
| 1
|
| ANGULAR-DRIFT
| C=1
| 1
|
| TAG-CHANNEL
| C=1, R=OBNAME
| 2
|
| TAG-VALUE
| -
| 3
|
| FRAME-TYPES
| R=OBNAME
| 4
|
| FRAME-NUMBERS
| R=UVARI
| 5
|
| COMMENT
| C=1, R=ASCII
| 6
|
| OBJECT
| C=1, R=OBJREF
| 7
|
| ATTRIBUTE
| C=1, R=IDENT
| 8
|
| NEW
| -
| 9
|
| OLD
| -
| 10
Figure 6-3. Attributes of Update Object
| |
Comments:
- 1. The TIME, BOREHOLE-DRIFT,
VERTICAL-DEPTH, RADIAL-DRIFT,
and ANGULAR-DRIFT
Attributes specify the Locus of the Tool Zero Point (see
§4.1.8.1) at the time the update was made.
The Time Attribute represents either
an absolute date and time (if using Representation Code
DTIME) or an elapsed time from the file creation time specified
by the Creation-Time Attribute of the Origin Object.
- 2.The TAG-CHANNEL Attribute
references a CHANNEL Object that is used as a tag or indicator
of when the given update takes effect. Frequently the Producer
knows of a specific link between the values of a particular
Channel, here called a Tag Channel, and the
update. The TAG_CHANNEL Attribute identifies a Tag Channel
for the current update.
- 3.The TAG-VALUE Attribute
specifies the value of the Tag Channel at the time the update
becomes effective. This may not be a unique value of the
Tag Channel. The update is assumed to go into effect at
the first Frame, following the Update Object, in which the
Tag Channel has a value equal to Tag-Value.
- 4.The FRAME-TYPES Attribute
is a List of Frame Types. The use of this list is connected
with the FRAME-NUMBERS Attribute, described next.
- 5.The FRAME-NUMBERS Attribute
is a List of Frame Numbers, corresponding to the Frame Types
in the Frame–Types list, that identify those Frames at which
the update becomes effective. The current Update Object
must precede the Frames specified by the Frame-Numbers Attribute.
- 6.The COMMENT Attribute is
additional textual information associated with the update.
- 7.The OBJECT Attribute references
the Object being updated. This is a full reference to the
Object. That is, it specifies the Object’s Type, Origin,
and Name.
- 8.The ATTRIBUTE Attribute
specifies the Name of the Attribute being updated.
- 9.The NEW Attribute specifies
the new Characteristics (excluding Label) assigned to the
Attribute being updated. The Units and Representation Code
Characteristics of the New Attribute must be the same as
the corresponding Characteristics of the OLD Attribute.
That is, only the Value and possibly the Count of an Attribute
may be updated.
- 10.The OLD Attribute specifies
the previous Characteristics (excluding Label) of the Attribute
being updated.