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Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc)  » [EMF Compare] Innacuracies while comparing lists of very similar elements
[EMF Compare] Innacuracies while comparing lists of very similar elements [message #619071] Thu, 29 May 2008 16:49
Victor Roldan Betancort is currently offline Victor Roldan BetancortFriend
Messages: 524
Registered: July 2009
Senior Member
Sorry to bother again about EMF Compare. I hope to help while reporting
my findings.

Try to imagine a multivalued referenced with lots of referenced
children. These elements are simple named elements. Take a look at the
following example (I'll put just 2 lists of names of these elements):

ELEMENT01 -- ELEMENT01
ELEMENT02 -- ELEMENT02
ELEMENT03 -- ELEMENT03
ELEMENT04 -- ELEMENT04
ELEMENT05 -- ELEMENT05
ELEMENT06 -- ELEMENT06
ELEMENT07 -- ELEMENT07

If I remove one element from the second EReference:

ELEMENT01 -- ELEMENT01
ELEMENT02 -- ELEMENT02
ELEMENT03 -- .........
ELEMENT04 -- ELEMENT04
ELEMENT05 -- ELEMENT05
ELEMENT06 -- ELEMENT06
ELEMENT07 -- ELEMENT07

The comparison will result in (its an example, but happens most of the
times):

ELEMENT01 -- ELEMENT01 <match>
ELEMENT02 -- ELEMENT02 <match>
ELEMENT03 -- ......... <deleted>
ELEMENT04 -- ELEMENT05 <modified>
ELEMENT05 -- ELEMENT06 <modified>
ELEMENT06 -- ELEMENT04 <modified>
ELEMENT07 -- ELEMENT07 <match>

This is just an example situation, but as you can see, the engine tries
to match elements in the same position, and gets a high similarity score
(since these elements are very similar, even in the name).

In my opinion, the engine should take a look in the neighborhood to
search for a perfect match. In case there is no perfect match, then it
could match those with the highest similarity score.

Cheers!

VĂ­ctor.
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