The Miscellaneous Parameters system table lets you control certain aspects of the KB.
Defining Whether to Repeat the Random Function
The Repeat-random-function-on-reset? attribute defines whether G2 shuffles the function upon a KB reset. If the attribute is set to yes, G2 does nothing and the random function returns the same sequence of random numbers after each reset, if it has the same argument. no, G2 seeds the random function so that it returns a different sequence of random numbers after each reset. Specifying the Workspace Margin
The Initial-margin-for-workspaces attribute specifies how close you can place icons at the edge of a workspace. The margin must be a non-negative integer value, measured in workspace units. The smaller the integer, the closer to the edge of the workspace you can place an icon. Starting a KB Automatically After KB Load
The Start-kb-after-load? attribute determines whether G2 starts the KB whenever it is loaded. G2 automatically starts the KB if this attribute is set to yes and displays an operator logbook message indicating that the KB has been started because of the system table setting. never start afterwards overrides the Start-kb-after-load? setting. For more information on this option and others, see Selecting Options When Loading a KB File.
Determining the KB Run State
The g2-run-state attribute determines the current run state of the KB. It has a symbol value which can be reset, running, or paused.
initially inform the operator that
"G2 is [the g2-run-state of miscellaneous-parameters]"
Backward-compatibility-features attribute lets you revert certain changes made in G2 since previous versions. Currently, the two changes that you can revert by completing this attribute are:
ignore duplicate list element error
extra vertices in g2-get-connection-vertices
Ignore-duplicate-list-element-error value causes G2 to disregard a change made to the insert action. The change to the action causes G2 to signal an error any time an attempt is made to insert duplicate elements into a list that disallows them. List items can allow or disallow duplicate elements. In previous G2 releases, attempting to insert a duplicate element into list items that disallowed them caused G2 to signal an error unless the
insert action specified an element location of either:
at the beginning of the list
at the end of the list
Entering the value
ignore duplicate list element error essentially reverses the change to the insert action for list elements to its previous behavior. Use this value if your KB relies on the previous behavior.
g2-get-connection-vertices system procedure returned the exact number of vertices of which a connection consisted. The purpose of this system procedure is to populate a list with the connection vertices of an existing connection, and then to use that list with the create connection action. The create action, however, does not require or expect the exact number of vertices. Instead, it requires only a minimum number of vertices. To recreate a connection, the create connection action determines the last one or two vertices from the position of the object to which a connection is being joined. The
g2-get-connection-vertices system procedure currently returns the minimum number of vertices that the create connection action requires. However, existing KBs may rely on the previous behavior or having the system procedure return the exact number of vertices. Specifying the value:
Backwards-compatibility-features attribute causes the system procedure to behave as it did in previous releases.
Class-Specific Attributes of Miscellaneous Parameters
The class-specific attributes of the Miscellaneous Parameters system table are: