Net.Data lets you define and reference variables in a
Net.Data macro. In addition, you can pass these variables from
the macro to the language environments and back. The variable names,
values, and literal strings that are passed are called tokens.
Net.Data puts no limit on the size of the tokens and will pass any
token that the memory of your system can handle. Individual language
environments, however, might provide restrictions on the token
size.
Net.Data variables can be defined depending on the type of variable
and whether it has a predefined value. These variables can be
categorized into the following types, based on how they are defined:
- Explicitly defined variables using the DEFINE statement in the DEFINE
block
- Predefined variables, which are variables that are made available by
Net.Data and are set to a value. This value usually cannot be
changed.
- Implicitly defined variables, which are of four types:
- Variables that are not explicitly defined but are instantiated when first
assigned a value.
- Parameter variables that are part of a FUNCTION block definition and that
can only be referenced within a FUNCTION block.
- Variables that are instantiated by Net.Data and correspond to form
data or query string data.
- Variables that are associated with a Net.Data table and that can
only be referenced within a ROW block or REPORT block.
The following sections describe:
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