I would like to add a new object into SLDD and display columns according to my object properties

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Perhaps the class() function could assist you. Or maybe just wrap different access methods in a try-catch so that if one method fails you could access the data using another method.

Is there a way to test if data dictionnatry entry are signal, simulink parameters, variables …
I need to access their value, but the access method depends on the data type into the dictionary

@Kanthaswamy – perhaps you can run struct(Simulink.data.Dictionary) or use my getundoc utility to check whether there are any hidden properties that you can use to store your comments/annotations.

I would need more information to help you. Simulink Data Dictionary files (.sldd) files are covered in many places. What is the format of the Data dictionary files (.dd) you are referring to?

Hi Matt,

To my knowledge the answer is no. In the automotive world there is a system for doing what you describe. It is fairly complex and based around a closed set of standards from the group “Association for Standardisation of Automation and Measuring Systems”. You can read about the group at http://asam.net. One of the motivations for the creation of Simulink Data Objects and the Simulink Data Dictionary was to support the creation of ASAP2 variable description files. These ASAM ASAP2 files along with ASAM CDF (Calibration Data Format) files provide the mechanism that calibration engineers use to read measurements from an embedded control system and to do the thing you describe providing initial values for constants and tuning values of other constants during operation.

The idea that you propose is interesting rather than parsing a config file it would be nice to use api commands to extract the values from a data dictionary file. I am not sure why The MathWorks has kept the Data Dictionary implementation under wraps. It seems very likely that under the hood it is very likely an embedded database along the lines of MySql Embedded or SqLite. If you could get that information from The MathWorks then it seems that it would be reasonably easy to do what you are asking.

If you find out more please let us know.

Donn

Have there been any hints of data dictionaries being natively usable in compiled models for anything besides compile-time initialization of data objects?

Hi Dave,

One further note. To open the pop-up dialog for a data dictionary entry named entryName programmatically you can use:

DAStudio.Dialog(hDictionary.getSection('Global').getEntry(entryName).getValue)

Donn