Programming Guide - Actian

global 4GL procedureglobal variablehexadecimal constantimage fieldimage trimImageField objectinclude scriptinheritance hierarchylistview fieldA global 4GL procedure is a routine written in 4GL that you can call by namefrom a script or another procedure. The procedure is a component of anapplication and is stored in the application's database.Global variables provide data that is pertinent to the entire application and areavailable for use in any script or procedure.Hexadecimal constants are a special version of string literals. They representcharacters expressed in hexadecimal notation and are most often used fornonprintable characters such as a newline character.An image field is a rectangular boundary, like a picture frame, in which youcan display bitmap images that are stored either in files or in the database.Unlike an image field, image trim displays a single bitmap image.The ImageField object describes the image field that you use to display thebitmap images. The ImageField object specifies how to display the image.Include scripts are scripts that contain 4GL code that you can includeanywhere in your frame, procedure, or user class script by using the #includestatement.With inheritance hierarchy, a class that is a child of another class is consideredits subclass and a class that is the parent of another class is considered itssuperclass. Each subclass inherits the attributes and methods for all itssuperclasses.A list view field lets the end user view and optionally manipulate or edit a listof items.Glossary 495