Where can I get DSC specification?

Hello, I'm looking for DSC specification (PostScript Language Document Structuring Conventions Specification, Adobe Technical Note #5001) which was available at this URL:
https://www.adobe.com/content/dam/acom/en/devnet/actionscript/articles/5001.DSC_Spec.pdf

However, the URL doesn't work anymore and I can't find an alternative location of this file.

Does anybody know where I can find this specification?