XSLT: Change certain attribute values

Question

I am a XSLT newbie and have a simple task:

Suppose I have the following XML:

Answer 1

You can define characters to replace and replacing chars, then use translate. You can use this XSLT:

    

    12
    AX

    
        
            
        
    

    
        
            
        
    

Another way:

    

    
        
            
        
    

    
        
            
                
                    A
                
            
            
                
                    X
                
            
        
    

will match all attributes attr1, then using xsl:choose you creates appropriate value for this attribute.