When you float the curser over a function in the registry, TIBCO BusinessEvents displays the description and syntax in a tool tip next to the curser. Tooltips also form the online reference to the function catalogs. See
TIBCO BusinessEvents Functions Reference in the HTML documentation.
Some functions are decorated with small letters that indicate useful information about use of the function. A function can have zero, one, or more decorations. the following figure shows all the available decorations. They are described in the sections after the figure:
Functions that can be used in TIBCO BusinessEvents Decision Manager are marked with a small table icon,

for example (which is also an action-only function).
These functions are for use in rule actions only. Some of these functions have side effects, for example they can change values. Other functions are limited to actions for other reasons. These action-only functions are identified by a small
a at the bottom right of the
f. For example:

.
Functions that can be used in queries or with Pattern Matcher are marked with a blue
q for example,

, for example. You can call such functions in a query string.