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System and method for creating, configuring, representing, and using variables in programs. A graphical user interface (GUI) may be displayed in response to user input requesting creation and/or configuration of a variable for use in or comprised in one or more programs, e.g., on various devices. Us

System and method for creating, configuring, representing, and using variables in programs. A graphical user interface (GUI) may be displayed in response to user input requesting creation and/or configuration of a variable for use in or comprised in one or more programs, e.g., on various devices. User input is received to the GUI configuring attributes of the variable, including: name, data type, and/or scope (e.g., local, global, or network). The configured attributes are stored and optionally displayed, e.g., in a resource tree, and the variable in each of the programs updated in accordance with the configured attributes. When at least one of the programs is incompatible with the configured variable, an error condition may be indicated, e.g., by providing information relating to portions of the program that are incompatible with the configured variable. The program may be modified in response to user input for compatibility with the configured variable.

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We claim: 1. A computer-implemented method for creating a variable for use in a program, the method comprising: displaying a graphical user interface (GUI) in response to user input requesting creation of a variable, wherein the variable comprises a specification of a named memory location for stor

We claim: 1. A computer-implemented method for creating a variable for use in a program, the method comprising: displaying a graphical user interface (GUI) in response to user input requesting creation of a variable, wherein the variable comprises a specification of a named memory location for storing one or more values, and wherein the variable does not store or reference program instructions; receiving user input to the GUI specifying attributes of the variable, wherein the attributes comprise: name; data type; and scope storing the specified attributes; instantiating the variable in accordance with the specified attributes; and displaying a representation of the variable, wherein the representation of the variable comprises an icon, wherein the variable is selectable via the representation for inclusion in one or more graphical programs, wherein each graphical program comprises a plurality of interconnected nodes that visually indicate functionality of the graphical program; including the variable in a plurality of graphical programs in response to user input; Configuring the variable, said configuring comprising: Displaying the GUI in response to user input requesting configuration of the variables; Receiving user input to the GUI configuring the attributes of the variable wherein the attributes comprise; name; data type; and scope; storing the configured attributes; and updating the variable in each of the plurality of graphical programs in accordance with the configured attributes. 2. The method of claim 1, wherein the scope comprises one of: local; global; and network. 3. The method of claim 1, wherein at least one of the plurality of graphical programs is incompatible with the configured variable, the method further comprising: indicating an error condition for the at least one of the one or more graphical programs. 4. The method of claim 3, wherein indicating an error condition for the at least one of the plurality of graphical programs comprises: providing information relating to one or more portions of the at least one of the plurality of graphical programs that are incompatible with the configured variable (See Gretta column 11, lines 26-49 where it is disclosed that error information for a graphical program can be collected and provided via a GUI to the user). 5. The method of claim 4, the method further comprising: modifying the at least one of the plurality of graphical programs in response to user input, wherein the modified at least one graphical program is compatible with the configured variable. 6. The method of claim 1, wherein said including the variable in the plurality of graphical programs comprises creating one or more variable references in the plurality of graphical programs. 7. The method of claim 6, wherein said instantiating the variable further comprises: deploying the variable to a memory location, wherein the one or more variable references in the plurality of graphical programs operate to access the memory location. 8. The method of claim 1, wherein said including the variable in the plurality of graphical programs further comprises: modifying the plurality of graphical programs to access the variable based on respective target platforms of the one or more graphical programs. 9. The method of claim 1, wherein said displaying a representation of the variable comprises displaying the representation of the variable in a window, wherein the representation is selectable via user input to the window. 10. The method of claim 9, wherein said displaying the representation of the variable in the window comprises: displaying one or more locations where the variable is deployed. 11. The method of claim 10, wherein said displaying one or more locations where the variable is deployed comprises: displaying the variable in one or more resource trees. 12. The method of claim 1, wherein prior to said specifying attributes of the variable, the variable has a default configuration of the attributes of the variable. 13. The method of claim 1, wherein the representation of the variable further comprises the name. 14. The method of claim 1, wherein the plurality of graphical programs are comprised on a plurality of devices coupled via a network (See Emmelmann page 2, paragraphs [0025]-[0027] where a web application operable over the internet for creating applications is disclosed. In other words, a program is comprised on at least a client and server device coupled via a network). 15. The method of claim 14, wherein at least one of the plurality of devices comprises a programmable hardware element. 16. The method of claim 1, wherein at least one of the plurality of graphical programs comprises a block diagram portion and a user interface portion (See Gretta column 3, lines 30-53 where the user can open an editor window to edit a block diagram). 17. The method of claim 16, further comprising: executing at least one of the plurality of graphical programs. 18. The method of claim 17, wherein, during execution of the at least one of the plurality of graphical programs, the graphical user interface portion is displayed on a display of a first computer system and the block diagram executes on a second computer system. 19. The method of claim 1, wherein the plurality of graphical programs comprise a graphical data flow program. 20. The method of claim 1, wherein the plurality of graphical programs are operable to perform one or more of: an industrial automation function; a process control function; a test and measurement function (See Gretta column 3, lines 30-53 where a system for graphically editing a function block diagram for process control functions is disclosed. Also see Gretta column 1, lines 14-26 where it is disclosed that the field bus network can be used both for process control and industrial automation). 21. Emmelmann discloses a computer-readable memory medium that stores program instructions for creating a variable for use in one or more programs, wherein the program instructions are executable by a computer to perform: displaying a graphical user interface (GUI) in response to user input requesting creation of a variable, wherein the variable comprises a specification of a named memory location for storing one or more values, and wherein the variable does not store or reference program instructions; receiving user input to the GUI specifying attributes of the variable, wherein the attributes comprise: name; data type; and scope storing the specified attributes; and instantiating the variable in accordance with the specified attributes; and displaying a representation of the variable, wherein the representation of the variable comprises an icon, wherein the variable is selectable via the representation for inclusion in one or more graphical programs, wherein each graphical program comprises a plurality of interconnected nodes that visually indicate functionality of the graphical program; including the variable in a plurality of graphical programs in response to user input; Configuring the variable, said configuring comprising: Displaying the GUI in response to user input requesting configuration of the variables; Receiving user input to the GUI configuring the attributes of the variable wherein the attributes comprise: name; data type; and scope; storing the configured attributes; and updating the variable in each of the plurality of graphical programs in accordance with the configured attributes. 22. A system for configuring a variable for use in one or more graphical programs, comprising: a processor; a memory medium coupled to the processor; and a display device coupled to the processor and the memory medium; wherein the memory medium stores program instructions which are executable by the processor to: display a graphical user interface (GUI) in response to user input requesting creation of a variable, wherein the variable comprises a specification of a named memory location for storing one or more values, and wherein the variable does not store or reference program instructions; receive user input to the GUI specifying attributes of the variable, wherein the attributes comprise: name; data type; and scope store the specified attributes; instantiate the variable in accordance with the specified attributes; and display a representation of the variable, wherein the representation of the variable comprises an icon, wherein the variable is selectable via the representation for inclusion in one or more graphical programs, wherein each graphical program comprises a plurality of interconnected nodes that visually indicate functionality of the graphical program; include the variable in a plurality of graphical programs in response to user input; Configure the variable, wherein to configure the variable the program instructions are executable to: Display the GUI in response to user input requesting configuration of the variable; Receive user input to the GUI configuring the attributes of the variable wherein the attributes comprise: name; data type; and scope; store the configured attributes; and update the variable in each of the plurality of graphical programs in accordance with the configured attributes. 23. A system for configuring a variable for use in one or more graphical programs, the system comprising: means for displaying a graphical user interface (GUI) in response to user input requesting creation of a variable, wherein the variable comprises a specification of a named memory location for storing one or more values, and wherein the variable does not store or reference program instructions; means for receiving user input to the GUI specifying attributes of the variable, wherein the attributes comprise: name; data type; and scope means for storing the specified attributes; means for instantiating the variable in accordance with the specified attributes; and means for displaying a representation of the variable, wherein the representation of the variable comprises an icon, wherein the variable is selectable via the representation for inclusion in one or more graphical programs, wherein each graphical program comprises a plurality of interconnected nodes that visually indicate functionality of the graphical program; means for including the variable in a plurality of graphical programs in response to user input; means for Configuring the variable, said configuring comprising: means for displaying the GUI in response to user input requesting configuration of the variables; means for receiving user input to the GUI configuring the attributes of the variable wherein the attributes comprise; name; data type; and scope; means for storing the configured attributes; and means for updating the variable in each of the plurality of graphical programs in accordance with the configured attributes.