1? label:
2 RESIGNAL
3? 
3.0 SQLSTATE
3.0.1! VALUE
3.0.2 sqlstate-string-constant
3.0.2 sqlstate-string-variable
3.0 condition-name
3.1? signal-information

signal-information:

1 SET
2 MESSAGE_TEXT
2 CONSTRAINT_CATALOG
2 CONSTRAINT_SCHEMA
2 CONSTRAINT_NAME
2 CATALOG_NAME
2 SCHEMA_NAME
2 TABLE_NAME
2 COLUMN_NAME
2 CURSOR_NAME
2 CLASS_ORIGIN
2 SUBCLASS_ORIGIN
3  = 
4 SQL-variable-name
4 SQL-parameter-name
4 diagnostic-string-constant