Defining execution procedures

An OSA defines ``execution procedures'' that can be performed on the objects or attributes of a class.

The object calls in the user interface code of the SCOadmin manager invokes these procedures using the user's input, which specifies the the affected objects and attributes, data values, and other relevant information. The procedures should return appropriate data and error messages to the calling routine.

There are only 10 possible operation types:

For attributes only	For objects only
get	delete
replace	action
replaceWithDefault	create
add	list
remove
filter

The possible operations are divided into two categories; those that work on the object's attributes, and those that work on the object as a whole. For each object and attribute, the class definition tables specify which procedures may act on the object or attribute.

Execution procedures can be split into four types of functions:

• Application procedures

• Filter procedures

• List procedures

• Helper procedures