- 1 What about the Leapster
- 2 Upward is Backward, Downward is Forward
- 3 Google says otherwise.... upward = forward and downward = backward
- 4 general updates to article
- 5 S-VHS and VHS
- 6 Forward compatibility in gaming systems
- 7 Again: Upward Compatible Means Backward Compatible in the OpenGL Spec
- 8 RFCoC (Request For Comments on Changes) for Forward/Backward terminology
- 9 Pokemon is not forward compatible
What about the Leapster
I'm no expert, but I think that the Leapster was a portable system that was forwards compatible.
Upward is Backward, Downward is Forward
After conducting some research into the matter, it appears that Upward Compatibility actually means Backward Compatibility. Refer to the following Sun documents for examples of this usage.
Here is an excerpt.
"The Java 2 SDK, v1.4.1 is upwards binary-compatible with Java 2 SDK, v1.4.0 except for the incompatibilities listed below. This means that, except for the noted incompatibilities, class files built with version 1.4.0 compilers will run correctly in the Java 2 SDK, v1.4.1."
Sun's documents always refer to the earlier versions as the "upward" versions; hence, in the sense of compatibility, "upward" is "backward".
Suggest changing the redirects appropriately.
Google says otherwise.... upward = forward and downward = backward
Plug _"backward compatible" "downward compatible"_ into Google and you will see what I mean.
Also, I didn't check the other languages, but the Japanese entry for backward is "kai" which corresponds to downward. Likewise, the Japanese entry for forward is "joi" which corresponds to upward.
Either way, this needs to be clarified and unified across languages.
- Why does it need to be unified? If Japanese happens to use the word for "downward" in that language, there's no requirement for English to do the same, or vice versa. Marnanel (talk) 16:35, 21 February 2008 (UTC)
general updates to article
I am removing the part about ms office as it is not really correct. The docx format is a compressed version of a variant of xml describing the document, whilst the old doc format was a proprietary binary format uncompressed. Also the docx patch for 2003 isn't forward compatibility because it was made after the release of office 2007. The code example section is also a bit too technical so I tagged that as well. Da rulz07 (talk) 13:13, 13 February 2008 (UTC)
S-VHS and VHS
A standard VHS VCR can’t just “ignore” the high-resolution S-VHS signal, unless it supports S-VHS Quasi Playback. Otherwise, the effect will be similar to poor tracking. rdl381 (talk) 21:04, 17 April 2010 (UTC)
- Later S-VHS VCRs can record and playback full S-VHS quality video onto higher quality standard VHS tapes, though commonly with a warning that the tapes may not play on any VCR other than the one they were recorded on. Some Digital 8 camcorders could record onto Hi-8 tapes with the same caveat of possibly not being able to playback on any other Digital 8 camcorder or deck. So does that make the VHS and Hi-8 tapes forward compatible media or are the decks and camcorders backward compatible with the media originally intended only for analog or in the case of VHS for lower quality analog video? Audio for VHS maintained forward compatibility, first with stereo then Hi-Fi stereo - any non-Super VHS tape will work in any VHS deck and as noted above even S-VHS tapes will play in the cheapest deck that has SQPB, which is just about all of them made since circa 1995. Bizzybody (talk) 09:21, 17 May 2011 (UTC)
- So does that make the VHS and Hi-8 tapes forward compatible media or are the decks and camcorders backward compatible with the media originally intended only for analog or in the case of VHS for lower quality analog video? It makes the *media* forward-compatible but not the decks. Indeed you can have the situation where a VHS tape will not play in a VHS deck, because the tape contains an S-VHS ET recording. In one sense, S-VHS ET is in fact a separate third standard, to which S-VHS decks are not forward compatible either. It just uses cheaper tape stock to achieve something better than VHS but not as good as S-VHS. You cannot, for instance, record in LP mode on a standard VHS tape with an S-VHS ET deck; but if you provide the same deck with an S-VHS tape, you can record in LP mode because it will use S-VHS proper, not S-VHS ET. Whophd (talk) 05:02, 4 November 2011 (UTC)
Forward compatibility in gaming systems
Wii can play Wii games as well as outdated Gamecube games, Playstation 3 can play Playstation 2 games, and the Playstation 2 could play a Playstation (classic) game. The Xbox 360 is also compatible with previous Xbox titles. Please change the gaming section, as the uncited knowledge is false. Thank you, --18.104.22.168 (talk) 17:34, 1 July 2011 (UTC)
Again: Upward Compatible Means Backward Compatible in the OpenGL Spec
According to the OpenGL ES 2 full spec, Appendix D "OpenGL ES 2.0 is not upward compatible with prior versions (OpenGL ES 1.0 and 1.1)." No matter what "Google says", People who write specifications seem to be clear on that topic. 22.214.171.124 (talk) 17:01, 25 October 2011 (UTC)
RFCoC (Request For Comments on Changes) for Forward/Backward terminology
I've changed the main article for new "Forward / Upward / Future-Time / Newer-Version compatibility", by adding better "Future-Time / Newer-Version" terms that show exactly the true meaning of 'forward' or 'upward' (the latter that challenged by many for reversed order on other materials).
I think it should be clearly defined like my additional terms, since the whole explanation is about timeline (past-future) and/or versioning (older-newer), you can recheck it again in the article for the whole idea meaning of the term.
E.g: "Future/Newer(-Version) compatible" is directly-understandable, perceived distinctly better and clearer than "Forward/Upward compatible".
--[Ois1974 @ 2014-03-31 Mon]--
Pokemon is not forward compatible
The Pokemon games do not accept input from the other games - forward compatability would mean that a Gen 3 game could accept a Charmander from Gen 4. Pokemon is backward compatability with X/Y being able to accept input from Ruby/Sapphire.The onl forward compatible games are the Gen 1 games, being able to accept input from the Gen 2 games.--126.96.36.199 (talk) 21:39, 30 June 2014 (UTC)