How to programmatically find the Simulink saved version for a .sldd dictionary object

I am now creating a MATLAB script to read the release versions in which a .sldd object is created in Simulink/MATLAB.

What I found but not for .sldd objects:

For example, An SLX file activeSuspension.slx's matlab version it has been saved in can be retrieved using Simulink.MDLInfo object and it's property 'ReleaseName'.

mdlInfo= Simulink.MDLInfo('activeSuspension');
matlabVersion=mdlInfo.ReleaseName;

From documentation https://in.mathworks.com/help/simulink/slref/simulink.mdlinfo.html I am aware that MDLInfo is only limited to .slx,.slxp and .mdl files.

My Query:

Now coming to my query, I would like to know if there is any direct API command like MDLInfo or a resuable script available to get the matlab version created for a .sldd file.

Since the metadata is visible in MATLAB UI for a .sldd file I believe there is a solid possibility to have an API command from which the "Saved in Simulink " version can be found, but I am unlucky so far to find one from documentation. Thanks in advance.

Answer 1

[Anay]

Hi Akhil,

I did not find any inbuilt functionality to get the MATLAB release version from the “Simulink Data Dictionary” files in the MATLAB documentation. There is a way to programmatically find the version of MATLAB/Simulink which created your “.sldd” file. I found that the “.sldd” files are stored as a compressed archive, similar to a “.zip” file. When you “unzip” a “.sldd” file you find a bunch of files which are used to store data and metadata of that object. In these files, there is a file named “mwcoreProperties.xml” which has the version of MATLAB used to create that file under the tag “matlabRelease”. So, in a nutshell, follow these steps to programmatically get release version from a “.sldd” file:

1. Unzip the “.sldd” file

2. From the extracted data, read the “mwcoreProperties.xml” file

3. Get the MATLAB version from the tag “matlabRelease”

Here is a sample code you can use for reference:

dictFilePath = 'dummyDictionary.sldd';%Change this to the path to your .sldd file

opFldr = 'sldd_temp';%Output folder path to extract the contents of the .sldd file

if ~exist(opFldr, 'dir')%Check if output folder exists
    mkdir(opFldr);%If not, create the folder
end

unzip(dictFilePath, opFldr);%Extract contents of the .sldd file

releaseMetaData = fullfile(opFldr, 'metadata', 'mwcoreProperties.xml');%Path of the mwcoreProperties.xml file

xmlDoc = xmlread(releaseMetaData);% Read the mwcoreProperties.xml file

rootNode = xmlDoc.getDocumentElement();% Get the root element of mwcoreProperties.xml

matlabReleaseNode = rootNode.getElementsByTagName('matlabRelease').item(0);%Find the matlabRelease tag in mwcoreProperties.xml

if ~isempty(matlabReleaseNode)%check if the element exists
    matlabRelease = char(matlabReleaseNode.getTextContent());%if yes, get the content (MATLAB version name)
    fprintf('MATLAB Release: %s\n', matlabRelease);
else
    disp('matlabRelease tag not found.');
end

%Delete the temporary folder after inspection
rmdir(opFldr, 's');

Hope this helps.

[Akhil]

Thank Anay for your response, I will go through it and try implementing and let you know if it worked in chat. Have a good day.

[Akhil]

Thanks Anay, the solution worked for me.