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    1 #!F-adobe-helvetica-medium-r-normal--18*
    2 #!N 
    3 #!CSlateBlue #!N  #!Rwritmod Writing a Simple Module 
    4 #!N #!EC #!N #!N This chapter discusses the basics of writing 
    5 a simple module for Data Explorer. Subsequent chapters cover some typical 
    6 types of modules you might want to write. Although Data Explorer 
    7 modules support a broad range of data and connections types, your 
    8 module need support only those types it can be expected to 
    9 encounter. Moreover, it is not necessary to manipulate all the components 
   10 of a Data Explorer Field. The programming examples in later chapters 
   11 illustrate modules that manipulate particular components (e.g., "data"). #!N #!N Before 
   12 writing a module, you should have a general understanding of the 
   13 Data Explorer data model and be familiar with the way data 
   14 is carried in Fields, Groups, and components (see  #!Ldatam,dxall1022 h Data Explorer Data Model  #!EL  ). For 
   15 a detailed treatment of the data model, see  #!Ldatmod,dxall197 h Understanding the Data Model  #!EL  in IBM 
   16 Visualization Data Explorer User's Guide. In this manual,  #!Ldatachp,dxall1061 h Working with Data Model Objects  #!EL  , summarizes 
   17 the routines that implement the model. #!N #!N Two other important 
   18 topics are briefly reviewed in subsequent sections: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   
   19 #!N #!N #!I30 #!N 1. managing the memory allocated to and 
   20 used by visual programs and their constituent modules (see  #!Lmemng,dxall1023 h Memory Management  #!EL  ) 
   21 and #!N #!I30 #!N 2. the Data Explorer execution model (see 
   22  #!Lexecm,dxall1026 h Data Explorer Execution Model  #!EL  ). #!N #!I0 #!N #!EF #!N #!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   
   23 Next Topic #!EF #!N #!N  #!Lall989,dxall990 h Getting Started Writing a Module  #!EL  #!N  #!F-adobe-times-medium-i-normal--18*   #!N