Open the airframe project and create a project object.

sldemo_slproject_airframe
proj = simulinkproject;

Create a new category of labels, called Engineers, to denote file ownership in a project. These labels have the char datatype for attaching character vector data.

createCategory(proj,'Engineers','char');

Use findCategory to get the new category.

engineersCategory = findCategory(proj,'Engineers');

Create labels in the new category.

createLabel(engineersCategory,'Tom');
createLabel(engineersCategory,'Dick')
createLabel(engineersCategory,'Harry')

Attach one of the new labels to a file in the project.

myfile = findFile(proj,'models/AnalogControl.slx')
addLabel(myfile,'Engineers','Tom');

Get the label and add data.

label = findLabel(file,'Engineers','Tom');
label.Data = 'Maintenance responsibility';
disp(label)

Label with properties:

            File: [1x80 char]
            Data: 'Maintenance responsibility'
        DataType: 'char'
            Name: 'Tom'
    CategoryName: 'Engineers'

Open the airframe project and create a project object.

sldemo_slproject_airframe
proj = simulinkproject;

Create a new category of labels.

createCategory(proj,'Coverage','double')

category = 

  Category with properties:

                Name: 'Coverage'
            DataType: 'double'
    LabelDefinitions: []

Find out what you can do with the new category.

category = findCategory(proj, 'Coverage');
methods(category)

Methods for class slproject.Category:

findLabel  removeLabel  createLabel                 

Open the airframe project and create a project object.

sldemo_slproject_airframe
proj = simulinkproject;

Create a category of labels for file ownership, and specify single-valued to restrict only one label in the category per file.

createCategory(proj,'Engineers','char', 'single-valued');