From: Paul Libbrecht <paul@activemath.org>

Date: Mon, 1 Mar 2004 12:57:35 +0100

Message-Id: <BF19F0A7-6B7F-11D8-91F0-000A95C50B1C@activemath.org>

Cc: mam1713@yahoo.com, Bernhard Keil <Bernhard.Keil@soft4science.com>

To: www-math@w3.org

Date: Mon, 1 Mar 2004 12:57:35 +0100

Message-Id: <BF19F0A7-6B7F-11D8-91F0-000A95C50B1C@activemath.org>

Cc: mam1713@yahoo.com, Bernhard Keil <Bernhard.Keil@soft4science.com>

To: www-math@w3.org

Dear WWW-Mathers, This looks to go in the direction I'm interested to... namely, what tickles me is how this offered to the user. On 20-Feb-04, at 23:53 Uhr, mam mam wrote: > I am attaching a file that contains 4 formulas. The 2nd and 4th > formula I got by selecting-copying and pasting the parts of first and > fourth formulas to other place. It depeds upon how do you select the > subformula. The more suitable way is to make the selection by Escape > key. Did you mean that or some what else? > (attachment now on http://klein.ags.uni-sb.de/webPo/Amaya_CnP.png) Muhammad, in your image, I seem to understand you also managed to copy the square-root function without its argument... is this true ? Have you discussed this possibility with your users ? You seem indeed to mention that there are some difficulties with the art of selection, I clear can imagine this if you allow to copy single operators (for example, I see no mouse-based visual way to select the "exponent" operator). Can you elaborate ? (does this escape key provide a kind of tree navigation ? If yes, does it do so in content or presentation ?) On 20-Feb-04, at 17:05 Uhr, Bernhard Keil wrote: > [...] > Wenn innerhalb der Gleichung: > Y= X^2 + 2 X + C > zum Beispiel das Fragment " 2 X" selektiert und kopiert wird, [...] Bernhard, you seem to mention that you can, in SciText, actually copy and paste a part of the text and a part of a formulae... for example that in Y= X^2 + 2 X + C, one can select the 2X... my question is then... can you select Y=X^2+2 without the X? The reason of my interest is that we have managed partially to perform copy and paste within a web-application, the ActiveMath learning environment and it sort of appears that sub-term-selection is wished (that is, while selecting, only well-formed-subterms can be selected)... (this can be tried from our official demo, try http://www.activemath.org/demo, the appearance of formulae is generated from OpenMath content). I am, however, not clear about it, and I would like to exchange about it. Sub-term-based selection means, at least as far as we have observed, that things such that a+b+c actually have a bracketting which is just not-visible. Suppose it is a+(b+c) then selecting "a+" with the mouse will select the whole a+b+c... Being aware of associativity would probably avoid that but that's yet another requirement of a presentation engine, alternatively, should authoring tools flatten such things and remove the bracketting, making it, in lisp-notiation, (+ a b c) ? Another pathological example where mathematical selection can be a challenge is: 3 = -2 (mod 5) selecting the equals should select the mod 5. How about selecting the bracket ? At least, if subterm-selection is not wished, or if operator-selection is offered (e.g. as when selecting square-root), then our visual selection of the "=" sign actually has to be made of two segments... have many people done that ? Thoughts would be appreciated. On 21-Feb-04, at 03:45 Uhr, Neil Soiffer wrote: > Take a look at the software mentioned on > http://www.w3.org/Math/implementations.html. A significant number of > those > applications can cut and/or paste MathML. Some presentation only, > some both > content and presentation, and maybe a few only content. You'll > probably > either need to try each piece or software or contact the authors, since > their capabilities change over time. Clearly, I'll start a questionnaire some time from now. The thing is that I am not clear yet about all the possible issues so I expect the mailing-list to help me better formalize... thanks paulReceived on Monday, 1 March 2004 07:55:49 UTC

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