UNI EN ISO 15438 : 2005

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions, mathematical symbols and abbreviations
  3.1 Terms and definitions
       3.1.1 Basic Channel Model
       3.1.2 Bar-space sequence
       3.1.3 Cluster
       3.1.4 Compaction mode
       3.1.5 Error correction codeword
       3.1.6 Extended Channel Interpretation
       3.1.7 Extended Channel Model
       3.1.8 Function codeword
       3.1.9 Global Label Identifier
       3.1.10 Macro PDF417
       3.1.11 Mode Latch codeword
       3.1.12 Mode Shift codeword
       3.1.13 Row Indicator codeword
       3.1.14 Symbol Length Descriptor
  3.2 Mathematical symbols and operations
  3.3 Abbreviations
4 Requirements
  4.1 Symbology characteristics
       4.1.1 Basic characteristics
       4.1.2 Summary of additional features
  4.2 Symbol structure
       4.2.1 PDF417 symbol parameters
       4.2.2 Row parameters
       4.2.3 Codeword sequence
  4.3 Basic encodation
       4.3.1 Symbol character structure
       4.3.2 Start and stop characters
  4.4 High level (data) encodation
       4.4.1 Function codewords
       4.4.2 Text Compaction mode
       4.4.3 Byte Compaction mode
       4.4.4 Numeric Compaction mode
       4.4.5 Advice to select the appropriate compaction mode
       4.4.6 Treatment of PDF417 reserved codewords
  4.5 Extended Channel Interpretation
       4.5.1 Encoding the ECI assignment number
       4.5.2 Pre-assigned Extended Channel Interpretations
       4.5.3 Encoding ECI sequences within compaction modes
       4.5.4 Post-decode protocol
  4.6 Determining the codeword sequence
  4.7 Error detection and correction
       4.7.1 Error correction level
       4.7.2 Error correction capacity
       4.7.3 Defining the error correction codewords
  4.8 Dimensions
       4.8.1 Minimum width of a module (X)
       4.8.2 Row height (Y)
       4.8.3 Quiet zones
  4.9 Defining the symbol format
       4.9.1 Defining the aspect ratio of the module
       4.9.2 Defining the symbol matrix of rows and columns
  4.10 Generating the error correction codewords
  4.11 Low level encodation
       4.11.1 Clusters
       4.11.2 Determining the symbol matrix
       4.11.3 Determining the values of the left and right row
              indicators
       4.11.4 Row encoding
  4.12 Compact PDF417
  4.13 Macro PDF417
       4.13.1 Compaction modes and Macro PDF417
       4.13.2 ECIs and Macro PDF417
  4.14 User guidelines
       4.14.1 Human readable interpretation
       4.14.2 Autodiscrimination capability
       4.14.3 User-defined application parameters
       4.14.4 PDF417 symbol quality
  4.15 Reference decode algorithm
  4.16 Error detection and error correction procedure
  4.17 Transmitted data
       4.17.1 Transmitted data in the basic (default) interpretation 4.17.2 Transmission protocol for Extended Channel
       4.17.2 Transmission protocol for Extended Channel
              Interpretation (ECI)
       4.17.3 Transmitted data for Macro PDF417
       4.17.4 Transmission of reserved codewords using the ECI
              protocol
       4.17.5 Symbology identifier
       4.17.6 Transmission using older protocols
Annex A (normative) Encoding/decoding table of PDF417 symbols character
        bar-space sequences
Annex B (normative) The default character set for Byte Compaction mode
Annex C (normative) Byte Compaction mode encoding algorithm
Annex D (normative) Numeric Compaction mode encoding algorithm
Annex E (normative) User selection of error correction
Annex F (normative) Tables of coefficients for calculating PDF417 error
        correction codewords
Annex G (normative) Compact PDF417
Annex H (normative) Macro PDF417
Annex J (normative) Testing PDF417 symbol quality
Annex K (normative) Reference decode algorithm for PDF417
Annex L (normative) Error correction procedures
Annex M (normative) Symbology identifier
Annex N (normative) Transmission protocol for decoders conforming with
        earlier PDF417 standards
Annex P (informative) Algorithm to minimise the number of codewords
Annex Q (informative) Guidelines to determine the symbol matrix
Annex R (informative) Calculating the coefficients for generating the
        error corrections codewords - worked example
Annex S (informative) Generating the error correction codewords -
        Worked example
Annex T (informative) Division circuit procedure for generating error
        correction codewords
Annex U (informative) Autodiscrimination compatibility
Bibliography

Describes the requirements for the bar code symbology known as PDF417. It specifies PDF417 symbology characteristics, data character encodation, symbol formats, dimensions, error correction rules, decoding algorithm, and a number of application parameters.