All user-defined variables must start with the $ character. It can be useful to know whether a variable is used in other expressions. As there is no way to check this, it is important to have a convention for naming variables. - These can be
- local - only used in the current expression or expressions in the current attribute.
- global - used in the expressions for other attributes in the same stream.
For information on making $-variables reusable in an application, see
- To distinguish between $-variables that are:
- local only used in the current expression or attribute, use a lowercase first letter, for example
$percent
Local $-variables are only used in the current attribute.
These may be called "local" - used in other expressions or attributes, use an uppercase first letter, for example
$Percent
Global $-variables are used in the expressions for other stream attributes.. - global
- For multi-word names, use no spaces and camel case.
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