access control list
X maintains a list of hosts from which client programs can be run. By
default, only programs on the local host can use the display, plus any
hosts specified in an initial list read by the server. This access
control list can be changed by clients on the local host. Some
server implementations can also implement other authorization
mechanisms in addition to or in place of this mechanism. The action of
this mechanism can be conditional based on the authorization protocol
name and data received by the server at connection setup.
A function that is designed to handle an input event. CLUE input
processing consists of matching an event with an event specification
found in a contact's event-translations slot and then calling
actions associated with the matching event specification.
A grab is active when the pointer or keyboard is actually owned
by the single grabbing client.
If W is an inferior of A, then A is an ancestor of W.
A unique ID corresponding to a string name. Atoms are used to identify
properties, types, and selections.