4.5. < AppML > reference manual

发布时间 ： 2025-10-25 13:33:38 UTC      

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4.5.1. < AppML > data model: 

<appml security="security"> <datasource> Datasource definition goes here datasource> <filters> Filter definitions goes here (if any) filters> <update> Update definitions goes here (if any) update> <anything> Anything you want to add to the model anything> appml>     
 
  4.5.2.  < AppML > Security  
 
 < AppML > Security is set through the security attribute in the < AppML > tag. 
 
 
 
<appml security="artists"> 
 
 
 
 The above application begins with security definition attributes, and only artists users are allowed to log in. 
 
 In this case, the user name logged in must be a member of the “artists” group. 
 
 
 
  4.5.3.  < datasource > element  
 
 The < datasource > element applied by < AppML > defines four different data types: 
 
 
 Child element (only one can be applied)  
 
  
  
 element 
 		  
 Description 
 		 
   
  
 < database > 
 		  
 Define data types 
 		 
 
  
 < xmlfile > 
 		  
 Define XML source files 
 		 
 
  
 < csvfile > 
 		  
 Define a comma-delimited text file 
 		 
  
 
 
 
 
  4.5.4.  < database > element  
 
 The < database > element defines the database 
 
 
 Child element  
 
  
  
 element 
 		  
 Description 
 		 
   
  
 < connection > 
 		  
 Link database name 
 		 
 
  
 < execute > 
 		  
 SQL statement executed before data retrieval (optional) 
 		 
 
  
 < sql > 
 		  
 SQL statements for retrieving data 
 		 
 
  
 < maintable > 
 		  
 Master table of the application (optional) 
 		 
 
  
 < keyfield > 
 		  
 Key field of the main table (optional) 
 		 
  
 
 
 
 
  4.5.5.  Data stored in the SQL database  
 
 This is the most common solution for data-oriented applications. 
 
 
 
<datasource> <database> <connection>CDDataBaseconnection> <sql>SELECT Artist, Title, Country FROM CD_Catalogsql> database> datasource>    
 The above model can select three data options (Artist, Title, Country) from the “CD_Catalog” table of the “CDDataBase” database. 
 
 The number of rows returned as a result is unknown. 
  
 
  4.5.6.  Data stored in XML files  
 
 < AppML > can read data from a XML file: 
 
 
 Example  
 
 
 
<appml> <datasource> <xmlfile src="cd_catalog.xml"> <record>CDrecord> <item> <name>Titlename> <nodename>TITLEnodename> item> <item> <name>Artistname> <nodename>ARTISTnodename> item> <item> <name>Countryname> <nodename>COUNTRYnodename> item> xmlfile> datasource> appml>    
  尝试一下 »  
 
 This method stores data in a XML file on the server. 
   
 
  4.5.7.  Data is stored in a text (Text) file  
 
 < AppML > can read data from a text file: 
 
 
 Example  
 
 
 
<appml> <datasource> <csvfile src="cd_catalog.txt"> <item> <name>Titlename> <index>1index> item> <item> <name>Artistname> <index>2index> item> <item> <name>Pricename> <index>5index> item> csvfile> datasource> appml>    
  尝试一下 »  
 
 This method can store data in a text file on the server. 
   
 
  4.5.8.  You can create a database if you want.  
 
 < AppML > you can create a database if necessary: 
 
 
 
<database> <connection>CDDataBaseconnection> <execute> CREATE TABLE CD_catalog ( CD_Id INT IDENTITY, Title NVARCHAR(255), Artist NVARCHAR(255), Country NVARCHAR(255), Company NVARCHAR(255), Price NUMBER,Published INT) execute> database>    
 Perfect the rapid prototyping model! 
   
                
                

                    

                        

                            
                                文章链接
                            
                            ：
                            4.5. < AppML > reference manual 
                        

                    

                

            
        
        

            

    
        
        

            

                

                    
                        
                            
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