PropertyObjectFile.Requirements
Returns the Requirements property for the file. The Links subproperty of the Requirements property is an array of string values that represents the product and unit requirements that the file covers.
This property is valid for sequence files, project files, and workspace files. This property returns an error for all other file types.
You can use the following pseudo code to add a new element to the list of requirements:
PropertyObject links = propertyObjectFile.Requirements.GetPropertyObject("Links", 0);
int nextAvailableIndex = links.GetNumElements();
links.SetValStringByOffset(nextAvailableIndex, PropertyOptions.PropOption_InsertElement, "REQ_ABC");