SAP ST ADDRESSING NODES IN COND



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ABAP_ST - Data Nodes in Conditions
For addressing data nodes in logical expressions, a special rule applies. Data nodes as dnode operands of preconditions, assertions, or conditions can be specified as follows:
If the name node, specified in accordance with the preceding addressing rules, contains a letter or an underscore in its first place and only letters, digits, hyphens, or underscores in the remaining positions, it can be specified directly.
The special names $ref and $alias can also be specified directly.
All other names must be specified in the form ref('node'). This particularly applies to the specification of a data root using .root .