I have a somewhat related question to what's going on here, so posting here seemed appropriate.

Am I correct in assuming when something is changed on a particular disc that the Disc ID changes too?

Reason I ask is if the Disc ID is identical, is it safe to assume the credits are the same on another version of the film? I'm not referring to this Harry Potter DVD btw, just curious for my own uses. I have a few box sets that are repackaged individual releases of TV shows.

Hopefully not hijacking this thread, seemed on topic to me though 

Quoting northbloke:

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Quoting Vittra:

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Am I correct in assuming when something is changed on a particular disc that the Disc ID changes too?

That should be how it works. I would be a bit wary with generic disc IDs (DVDVOLUME etc.) but if it's a properly generated ID then discs with the same ID should have the exact same content.

Thanks north, the one's I'm referring to are standard Disc IDs, not generic. I ask only because if I have a box set that doesn't yet have child profiles available I will check to see if the single volumes have been released with the same Disc IDs. If so I will add those as my child profiles, update them with cast lists, if missing, then change UPC to disc ID and submit the child profiles.

Thanks again for the help North~ 

Quoting Vittra:

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Thanks north, the one's I'm referring to are standard Disc IDs, not generic. I ask only because if I have a box set that doesn't yet have child profiles available I will check to see if the single volumes have been released with the same Disc IDs. If so I will add those as my child profiles, update them with cast lists, if missing, then change UPC to disc ID and submit the child profiles.

Thanks again for the help North~ 

Besure and not only change the UPC to discID but, also any other changes that maybe unique to the release you have.  Such as cover art, release date, SPR also verify that the existing data is correct.

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You should only update the profile for the disc you actually own.

Back to this thought.

@Ruben:
Now you are propagating incorrect interpretations into multiple profiles for a film.  Specifically your changes for Harry Potter: The Goblet of Fire.

On screen:
Role: Death Eater
on screen Actor credit: Richard Rosson (Rubber Ritchie)
[parsed Richard//Rosson (Rubber Ritchie)]

proposed change is to: Richard/(Rubber Ritchie)/Rosson

And you invoke the nickname Rule to explain this: If an actor's credited name includes a nickname, highlighted by ", ’ or ( ), list it in the middle name field. For example John "JS" Smith, John ‘JS’ Smith or John (JS) Smith

But it isn't a nickname but a stage name appended to a "street" name.  http://www.flexinthecity.com/index.html.  He's not known as "Rubber Ritchie Rosson"

The Rule doesn't provide license to shuffle name parts and is correct as credited (and as his only credit it is by definition common in our database) and shouldn't be changed.

Quoting T!M:

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That is a particularly strange section of the rules, IMHO. I've always pretty much ignored it myself, but Ruben's interpretation really isn't very surprising: technically, he's doing exactly what the rule says. If it were up to me, I'd remove that entire line from the rules.

I presumed the rule was there simply to tell people how to parse names with nicknames embedded. This must have been an issue in the past.

But no where does it say to re-shuffle parts of the on screen name.  And it's not a nickname anyway.

The credit is question is an odd duck, that is certain, but that is not a reason to twist it into something it isn't.

Quoting Gemini76:

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I must surely say that Robber Richie must be his nickname. I don't see any reason he should be credited with both his stage name and his real name in the same end credits. So I think this is correct by ruben. It can't be correct having the (Rubber Richie) as part of his last name at least.

Yes - it is correct according to the exactly as credited section of the rules.

Quoting T!M:

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But it does. The rule literally says: "If an actor's credited name includes a nickname, list it in the middle name field." It goes on the provide examples of how such nicknames may look like, and one of those examples matches the format of this particular case exactly. This is a very specific instruction: nowhere does it imply that it is affected by the order the parts are shown on-screen. The rule just says to put the nickname in the middle name field, period. Ruben did exactly that.

Again: I don't agree with this, and I never understood why this was included in the rules. But technically, this is what it says.

So in this one instance the on screen credit is, by our definition, incorrect?

I don't buy that.

The first rule of Cast credits is:

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For any film with standard credits, take the actor information from the end credits only, with names and roles listed exactly as they are in the credits and in exactly the same order credited.

The "nickname" rule doesn't supersede this but tells us how to parse names with embedded nicknames.  The "stage name" Rubber Ritchie is not embedded so the "nickname" rule isn't relevant. 

That one rule can't be used to the exclusion of others just because it fits an argument, the Rules as a whole guide us.