Comment 18 for bug 1297051

Here's an alternative suggestion for identifying the terminal implementation: Implement the DA3 sequence and implement the extension proposed below.

DA3 is supposed to elicit a globally unique, persistent terminal identifier (its serial number if you like), as documented here:

http://www.vt100.net/docs/vt510-rm/DA3

However that makes little sense in a world where most(?) terminals are emulated and does not apparently even work on a real VT5xx (just returns 00000000 as the id). So the following extension is proposed.

Respond to DA3 with DCS!|00000000;swidST where swid identifies the software product name and version. The syntax of swid could be borrowed from RFC 2616 (HTTP 1.1) Section 3.8. I would prefer that product names are explicitly qualified by (preceded by) the Java-style label-reversed domain name. Hence a company called PCsoft that registers pcsoft.com and sells a product called SuperTerm might send a product name and version of com.pcsoft.SuperTerm/1.0

(DA3 is seemingly not implemented at all in xterm so there is minimal scope for breakage in that regard.)

Product names should be compared without regard to case.