Unplugged & Install-Friendly XML

[Steve Muench]

Hello, 
 
If one were building a product which used XML to write out 
metadata about things, what is the recommended approach 
to referring to a product-specific DTD in your XML 
document instances given the fact that: 
 
    1. A user will want to work on his files when 
       not plugged into the Internet. 
 
         I'm assuming this means that referring 
         to DTD by http://company.com/xyz.dtd is 
         not gonna cut the mustard. 
 
    2. A user can install that product into any 
       directory on his hard drive. In particular 
       the product-specific DTD file could land 
       up in the .\LIB subdirectory of an arbitrary 
       "install home" that the user picks at 
       install time. 
 
Is there any way that I've missed in my read of the 
XML spec which would allow a DTD to use a syntax like: 
 
<?xml version="1.0"?> 
<!DOCTYPE TopLevelThingy SYSTEM "file:/&INSTALL_HOME;/lib/jbo.dtd"> 
 
Where the value of the environment variable INSTALL_HOME 
would be setup by the installer? 
 
Thanks for any ideas... 
 
_________________________________________________  
 Steve  | XML Technology | smuench at oracle.com  
 Muench |   Evangelist   | geocities.com/~smuench 
 


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