Re: How to determine supported entities

Have you considered making the address of common.ent in its parameter 
entity reference a URL referencing a website?  That would make it 
read-only, maintainable in one location, and instantly updated to all users.

<!ENTITY % common_entities SYSTEM 
"http://redhat.com/somepathto/common.ent" >

That wouldn't prevent someone from adding entity declarations to their 
XML file to override particular entities, though.

Bob Stayton
Sagehill Enterprises
[email protected]

On 4/2/2019 4:34 PM, David O'Brien wrote:
> Is there a way to differentiate between (what I call) "natively
> supported entities" (&nbsp; &lt; &gt; &trade; and all those) and what we
> add in .ent files?
>
> In our projects we normally have one /Common/common.ent file where we
> define numerous entities. This is shared across all projects. What we
> want to do is make sure people don't add to this file, resulting in
> different versions for different projects. This file, combined with the
> natively supported entities, would constitute a "whitelist" of entities.
>
> We've done something similar with DocBook elements, where we have a
> whitelist of supported elements (we don't use the entire 4.5 schema) and
> if our script hits a "black" element it throws a warning. To do the same
> with entities means we'd have a *very* long whitelist just for the
> natively supported entities.
>
> Perhaps there is a better way?