When the Tcl library receives commands it parses them into component fields and executes built-in commands directly. Commands may be generated by reading characters from an input source, or by associating command strings with elements of the application's user interface, such as menu entries, buttons, or keystrokes. The application program generates Tcl commands and passes them to the Tcl parser for execution. The Tcl library consists of a parser for the Tcl language, routines to implement the Tcl built-in functions, and procedures that allow each application to extend Tcl with additional commands specific to that application. Tcl is also a library package that can be embedded in application programs. Tcl users can write command procedures to provide more powerful commands than those in the built-in set. Tcl has a simple syntax and is programmable. Tcl is a simple textual language that is intended primarily for issuing commands to interactive programs, such as text editors, debuggers, illustrators, and shells. Tcl, current release version 7.5, stands for Tool Command Language. John Ousterhout from the University of California, Berkeley, California. Allow access to the Oracle message file system for NLS support.Provide information on the nature of the job or event, and any input or output.Can be used to drive the user interface.A syntax for describing job and event scripts that:.Communication with the Oracle Intelligent Agent and other Oracle software, such as Oracle Trace.SNMP accessing, both for the database MIB variables that the agent itself supports, and for external MIBs, like the host's or other SNMP-enabled services.SQL and PL/SQL functions for accessing the RDBMS.
A content script or other extension sends a message.The background page was listening for an event, and the event is dispatched.The extension is first installed or updated to a new version.Extensions monitor these events in their background script, then react with specified instructions.Ī background page is loaded when it is needed, and unloaded when it goes idle. Events are browser triggers, such as navigating to a new page, removing a bookmark, or closing a tab. We strongly recommend that new extensions target Manifest V3.Įxtensions are event based programs used to modify or enhance the Chrome browsing experience. The page you're viewing describes the Manifest V2 extension platform.Īs of JanuChrome Web Store has stopped accepting new Manifest V2 extensions.