Editing Data-Dictionary (section)

== Conventions ==

{|
!width="50%"| Symbol
!width="50%"| Meaning
|-
| <code>PIC X(n)</code>
| Alphanumeric, n characters
|-
| <code>PIC 9(n)</code>
| Unsigned packed decimal display, n digits
|-
| <code>PIC S9(n)</code>
| Signed packed decimal display, n digits
|-
| <code>PIC 9(n)V9(m)</code>
| Unsigned numeric with m implied decimal places (no decimal point stored)
|-
| <code>PIC Z(n)</code>
| Zero-suppressed display numeric, n digits
|-
| <code>COMP-3</code>
| Packed-decimal binary storage (2 digits per byte + sign nibble)
|-
| <code>COMP-5</code>
| Native binary integer (platform word size)
|-
| <code>88</code>
| Condition-name — a boolean alias tested via <code>IF &lt;name&gt;</code> or <code>WHEN &lt;name&gt;</code>
|-
| <code>—</code>
| Not applicable (group item or 88-level)
|-
| ⚠️
| Known issue or deviation from standard
|}

'''Level hierarchy used in this codebase:'''

<pre>01  Group root
 03  Sub-group or elementary item
  05  Nested elementary item
   07  Doubly-nested elementary item
   49  Special level for variable-length groups (SQLERRM in SQLCA)
88  Condition-name (under any level)</pre>

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