API 66 : 1996

PART 1: MODEL AND METHODOLOGY
0 Introduction
1 Scope
2 Definitions
3 Concepts
4 Audience
5 Schema Categories
6 Schema Administration
7 Data Model
8 Schema Specification
9 Notation: How to Refer to an Attribute
10 Dictionary Specification
PART 2: LOGICAL FORMAT
0 Introduction
1 Scope
2 References
3 Definitions
4 Concepts
5 Representation Codes
6 Visible Record
7 Logical Record
8 Explicitly-Formatted Logical Record (EFLR)
9 Indirectly-Formatted Logical Record (IFLR)
10 Logical File
11 Representation Code Descriptions
PART 3: PHYSICAL BINDINGS
0 Introduction
1 Scope
2 Definitions
3 Concepts
4 Storage Unit Terminology and Requirements
5 Storage Set Terminology and Requirements
6 Storage Unit Label Contents
7 Binding to Standard Magnetic Tapes
8 Binding to Random Access Files
9 Binding to Peer-to-Peer Communication Streams
PART 4: THE API-SI MODEL
0 Introduction
1 Scope
2 References
3 Definitions
4 Concepts
5 Unit Expression Grammar
6 Unit Conversion
PART 5: THE API-SI UNIT SYMBOLS
0 Introduction
1 Scope
2 References
3 Base Unit Symbols
4 Derived Unit Symbols
PART 6: BASIC SCHEMA
0 Introduction
1 Scope
2 Definitions
3 Authority
4 Concepts
5 Unit model
6 Dictionary-Controlled Identifiers
7 Required vs Optional Use of Attributes
8 Frequently-used Attributes
9 Required Object Types
10 Optional Object Types
PART 7: BASIC SCHEMA DICTIONARY
0 Introduction
1 Scope
2 Authority
3 Concepts
4 Channel Reference Values
5 Frame Reference Values
6 Process Reference Values
PART 8: DLIS SCHEMA
0 Introduction
1 Scope
2 Definitions
3 Authority
4 Concepts
5 Unit model
6 Dictionary-Controlled Identifiers
7 Required vs Optional Use of Attributes
8 Frequently-Used Attributes
9 DLIS Object Types
PART 9: DLIS DICTIONARY
1 Introduction
2 Authority
3 Concepts
4 Calibration-Measurement Reference Values
5 O/Channel Reference Values
6 O/Computation Reference Values
7 Equipment Reference Values
8 Message Reference Values
9 O/Parameter Reference Values
10 O/Zone Reference Values
APPENDIX A: ORGANIZATION CODES
0 Introduction
1 Scope
2 Assignment of Organization Codes
Figures
    2-1 Conceptual View of a Logical Format (bound to a
         Physical Format)
    2-2 Visible Record Structure
    2-3 Logical Record Segmentation (Without Encryption)
    2-4 Logical Record Segmentation (With Encryption)
    2-5 Application-Level View of a Set (Type = FOO)
    2-6 Component-Level View of a Set
    2-7 Component Structure
    2-8 Examples of Attribute Component
    2-9 Structure of an IFLR Body and Relation to its
         Data Descriptor
    6-1 Examples of Aggregates
    6-2 A Frame Block
    6-3 An Unbounded Grid of Frame Type Indexes
    8-1 Spatial Coordinate System for a Wellbore Path
    8-2 Illustration of Simple Two-point Linear
         Calibration
    8-3 Tool String Configuration
Tables
    2-1 Visible Record Header Fields
    2-2 Logical Record Segment Header Fields
    2-3 Logical Record Segment Header Attributes
    2-4 Logical Record Segment Encryption Packet Fields
    2-5 Logical Record Segment Trailer Fields
    2-6 Component Structure
    2-7 Component Role
    2-8 Normal, Redundant and Replacement Set Components
    2-9 Object Component
    2-10 Attribute Components
    2-11 IFLR Modifier Options
    2-12 Representation Code Summary
    2-13 Compound Representation Code Descriptions
    3-1 Storage Unit Label Fields
    3-2 Storage Unit Structure Options
    5-1 SI Base Unit Symbols
    5-2 API-SI Base Unit Symbols - Non-Currency
    5-3 AO-SI Currency Base Unit Symbols
    5-4 API-SI Derived Unit Symbols
    6-1 Frequently-Used Attributes
    6-2 FILE-HEADER Attributes
    6-3 ORIGIN Attributes
    6-4 AXIS Attributes
    6-5 CHANNEL Attributes
    6-6 COMMENT Attributes
    6-7 COMPUTATION Attributes
    6-8 FRAME Attributes
    6-9 GROUP Attributes
    6-10 NO-FORMAT Attributes
    6-11 ORIGIN-TRANSLATION Attributes
    6-12 PARAMETER Attributes
    6-13 PROCESS Attributes
    6-14 UPDATE Attributes
    6-15 ZONE Attributes
    6-16 Updatable Attributes
    7-1 CHANNEL:DIRECTION Reference Values
    7-2 CHANNEL:FLAGS Reference Values
    7-3 FRAME:FLAGS Reference Values
    7-4 PROCESS:STATUS Reference Values
    8-1 Calibration attributes
    8-2 CALIBRATION-COEFFICIENT Attributes
    8-3 CALIBRATION-MEASUREMENT Attributes
    8-4 DLIS-CONTEXT Attributes
    8-5 EQUIPMENT Attributes
    8-6 MESSAGE Attributes
    8-7 PATH Attributes
    8-8 SPLICE Attributes
    8-9 TOOL Attributes
    8-10 WELLBORE-PATH-DATUM Attributes
    8-11 Updatable Attributes
    9-1 CALIBRATION-MEASURE-PHASE Reference Values
    9-2 O/CHANNEL:KIND Reference Values
    9-3 O/CHANNEL;PROPERTIES Reference Values
    9-4 EQUIPMENT;LOCATION Reference Values
    9-5 EQUIPMENT;TYPE Reference Values
    9-6 MESSAGE;TYPE Reference Values
    9-7 O/ZONE:DOMAIN Reference Values
    A-1 Organization Codes

Presents an industry standard for recording of well log data on magnetic tape as well as other storage media. Defines data organization on two levels, on the Logical Format level and on the Physical Format level. The Logical Format concerns the syntactic and semantic organization of a sequence of data characteristics. The Physical Format concerns the location and physical organization of data on various media.