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Pkg::IsAvailable — Check if package (tag) is available
Synopsis
            boolean
            
IsAvailable          (
            string
             
tag          
); Parameters
            
string            
tag          
Return
            
boolean          
Description
        
 returns a 'true' if the tag is available on any of the currently active installation sources. (i.e. it is installable)
      
        
 tag can be a package name, a string from requires/provides or a file name (since a package implictly provides all its files)
      
Usage
   Pkg::IsAvailable ("yast2") -> true
 
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