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AW: call for comments on publishing task models spec

From: Gerrit Meixner <Gerrit.Meixner@dfki.de>
Date: Thu, 19 Jul 2012 08:26:11 +0200
To: "'Dave Raggett'" <dsr@w3.org>
Cc: <public-mbui@w3.org>
Message-ID: <003601cd6577$65e9d7f0$31bd87d0$@dfki.de>
Hi Dave,

here are my suggestions which can be discussed (together with all other
suggestions) during the telephone conference today.

- in my opinion there's a need to give our task model specification which
("...can be used as the basis for interchange of Task Models between
different user interface development tools") a new name to show that we're
developing an interchange language.
--> e.g., Task Model Interchange Format (TMIF)

Section 1:
- "The purpose of this document is to define a standard for interchange of
task models, and provides an updated definition of the widely adopted
ConcurTaskTrees (CTT) notation."
--> I would like to write that the standard is based on CTT and integrates
the most important concepts also from other task modeling languages we have
considered (e.g., during our 1st F2F meeting)
- Figure 1: I would like to exchange the figure with a more neutral figure,
i.e. e.g., removing the icons to visualize the different task types.

Section 3:
- "This section defines a normative meta-model for the CTT notation."
--> In my opinion this is wrong. We don't define a normative meta-model for
the CTT notation, the aim is to define a meta-model for the new language
(which is based on CTT).

Section 3.1
- As mentioned and discussed earlier I would like to remove the
Suspend-Resume operator.

Section 3.2
- As mentioned and discussed earlier there is no need to have a user task in
the specification. A user task does not change or influences the UI.

Section 3.3
- I would like to specify the task type "Selection" in more detail, e.g.,
the user interacts with the system to select one or more items from a range
of given ones (it is important that there are already given items available)
- The task type "Edit" it too vague. Here you have 2 possibilities: 1) the
user interacts with the system to make relative changes to an existing value
or item and 2) the user interacts with the system to enter an absolute
value, overwriting previous values. 
  Therefore I would like to split up the task type "Edit" into 1) "change"
and 2) "enter"
- zooming and filtering are just special cases of the trigger task type.
Both are just functions which will be executed by the system to change the
UI. The overlaying task type is the "control" task type.
- The task type "DetailsRequest" should be renamed to a more general type
e.g., "inform". 

Section 3.5
- We have pre- and post-conditions. What about invariants? E.g., invariants
are important for the microwave. It will only work if the door of it is
closed. The same would fit e.g., for industrial robots which are normally in
a cage to protect humans. If the cage is manually opened the current working
task must be stopped because the invariant (cage closed is false). 

Best regards

Dr.-Ing. Gerrit Meixner
Head of the Human-Machine-Interaction group

German Research Center for Artificial Intelligence (DFKI)
Innovative Factory Systems (IFS)
Trippstadter Strasse 122
67663 Kaiserslautern, Germany

+49 (0) 631 / 205 75 3415
+49 (0) 631 / 205 37 05
Legal statement: 
Deutsches Forschungszentrum für Künstliche Intelligenz GmbH
Trippstadter Strasse 122
67663 Kaiserslautern

Prof. Dr. Dr. h.c. mult. Wolfgang Wahlster (Vorsitzender), Dr. Walter
Vorsitzender des Aufsichtsrats: 
Prof. Dr. h.c. Hans A. Aukes
Amtsgericht Kaiserslautern, HRB 2313

-----Ursprüngliche Nachricht-----
Von: Dave Raggett [mailto:dsr@w3.org] 
Gesendet: Montag, 16. Juli 2012 20:08
An: public-mbui@w3.org
Betreff: call for comments on publishing task models spec

This is a call for comments on publishing the following document as a First
Public Working Draft:


My aim is to ask for a formal resolution in this week's MBUI telecon to
publish the document.

p.s. this was derived from the Google Doc, although it took quite a bit of
Dave Raggett <dsr@w3.org> http://www.w3.org/People/Raggett
Received on Thursday, 19 July 2012 06:31:27 UTC

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