[sc34wg3] Removing added scope from <mergeMap>

Kal Ahmed sc34wg3@isotopicmaps.org
Mon, 16 Jan 2006 10:19:39 -0000

Geir Ove wrote:
> XTM as it stands today (XTM 1.0) does not give you "safe
> aggregation". It is pretty easy to cause all kinds of damage to the
> "mother" topic map if the "included" topic map wants to do so -- even
> with added scope on <mergeMap>.
> The only way that "safe aggregation" can happen is if the software
> provides that kind of support.

But with added themes on import, it is possible to track down all assertions
made by the imported topic map. The only things that cannot be tracked down
are properties that are not scoped (in particular subject identity
assignment). However, I don't see this as an argument for removing added
themes. If anything, it is an argument for *strengthening* the provisions
for dealing with partially trusted sources, not for removing them entirely.