Hi Tom,

thanks for documenting your great feature so well, that really helps.

At the forum I have seen several posts like "With the new Expression Manager you can solve your problem this way or that way.". Regarding your question for which additional information we might need I would like to ask for a documentation section with some use cases. There are several issues at which EM can be used in the future so having a small use case, just a simple step-by-step explanation how to set it up for each case, will help a lot to understand the various situations at which EM could be used.

Some possible use cases from memory:

1. Calculate assessment values at runtime and store the results at the survey data

2. Replace conditions (we might need 2-3 use cases for different conditions of different complexity)

3. Replace text strings based on certain values like "Dear {Mr}/{Mrs} Smith..."

4. Show a summary of the user's answers at the end of the survey

...

For a first and general understanding of EM I consider this quite useful and a good first start to play around with it. Once this is done we could spread the word on limesurvey.org (like for the CPDB feature: http://www.limesurvey.org/en/component/content/article/1-general-news/226-new-qcentral-participants-databaseq-feature-is-ready-for-testing) and at the forum.

The combination of use cases and some testing instructions might help to get more users on board. What do others think?

Best regards,
Marcel

Am 22.09.2011 01:29, schrieb Thomas White, MD, MS, MA:
Carsten, Thibault and others-

As discussed in yesterday's developer meeting, the core documentation for EM is now complete here:  http://docs.limesurvey.org/Expression+Manager+for+Developers
You should also read http://docs.limesurvey.org/Expression+Manager for additional details and nuances.

Please let me know if there are other categories of information you'd like me to add.

/Tom
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