Removing ownership & permissions for all files burned to a DVD?

Hello,
I am new to the concept of "ownership & permissions". Do they apply to files burned to DVD or just the files on the computer? I would like to burn some files onto a DVD for backup and I do not want to copy the "ownership & permissions" settings of the files - I just need to backup the files only. I would like to back the files up for a year or two and I am concerned that in the future I may not remember my usernames or passwords to access these files from the burned DVD.
Do "ownership & permissions" apply to files burned onto a DVD? Or does the DVD burning process erase the "ownership & permissions" settings? I tried to burn a DVD from OSX by creating a burn folder and I didn't see any setting that allowed me to remove the "ownership & permissions" settings.
Thank you for any insite into this.

Thanks Mulder,
Here is what I am trying to do:
I do not need to backup any system files - I already have OSX on my original DVD if I needed to re-install. I only need to backup the users' document files and maybe some email folders in the users' libraries.
I set up three accounts:
1. The first account is for admin purposes only.
2. The second is for my own use - it is the account used most often on this computer.
3. The third account is for my family.
Note: I will set up a fourth account for our student renter later.
I will have access to the user names and passwords of all these accounts in case I need to go into the accounts to back up their documents. But the user(s) of the family account will not have my password - so the kids don't accidently erase any of my files.
When working in the second account (which is used most often by myself), I sometimes need to place newly created files into the "document" folder on our family account (the third account). And so I purposely changed the "Ownership & Permissions" on the "document" folder on our family account (the third account) to Group: second account. This allows me (the second account) to place files into the "Document" folder of the third account (the family account). After doing this, I also need to change the "Ownership & Permissions" of any added files to Group: third account so the user(s) of the family account can edit (read and write) the files I add from the second account.
An alternative setup that I decided not to use: I could have made use of the "users/shared" folder for this, however, I do not want everyone to be able to access these files - especially when I set up a fourth account (or even more accounts) in the future. I only would like to share the contents of the third account's "Document" folder between two users (user of the second account and the user of the third account).
Now I will continue the explanation of my setup:
Over time the "Document" folder of the third account (the family account) will become filled with a mixture of files with different Ownerships - some created from the second account and some created from the third account - but all editable from either the second account or the third account by assigning each other access via the "Group" designation in "Ownership & Permission". Because of this mix of files with different ownerships, I could, if I wanted to keep the settings consistent, select the "Document" folder of the third account (the family account) and change the ownership of all enclosed items to the user of the third account by using the "Apply to enclosed items". I would probably also change the "Group" designation to the second account too.
I will be able to make all these changes because I have the user names and passwords for all the accounts.
Now here is my main question:
My concern is that when it comes time to backup the document folders onto DVD, what if in a couple years I forget these passwords? You see, I would rather not copy any "Ownership & Permissions" settings of the files onto the DVD. Lets say that in a couple of years I go back to my DVD backup and need to pull off some old jpeg files and put them onto my computer. When I insert the old backup DVD will it say: "Sorry, you do not have access priviledges to view these files" or something like that? That would be a real problem. These are my own files. Why would I want to risk making an important backup DVD un-useable in the future because of some long-and-forgotten permission settings?
What I would like to do is copy all my files onto DVD for backup in such a way that "Ownership & Permissions" are not copied. Why put the risk of a limitation on your important backups? Is there a better way to do this? What do other people do?
Am I making this more complicated than it has to be? As you can tell, I am a beginner with OSX (and permissions) and I am looking for some advice. Thanks
Mulder, when you wrote:
"If you're trying to backup just selected files, such as your purchased music or applications, etc., then ownership and permissions shouldn't be a problem."
did you mean that ownership and permissions are not copied? That would be great. But I am not sure if that is what you meant to write. Thanks!

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