I have a dimension named [D Projects] that contains a lot of attributes related to project like project number, project title, project start date, area ... etc.
How can i tell the SSAS engine that the relation between some attributes is one-to-one and one attribute is just a description for another?, for example the relation between the project number and the project title is one to one. For a certain project number you can't find more than one project title, and the same for the project start date, nobody will group by the project start date! yet when i select (in Excel) to show it with the project number and many other attributes, SSAS consider it as an attribute hierarchy independent from the project number, which affects the performance as it will cross join this project date attribute with all other selected attributes to find the possible valid existing combinations, when in fact there is only one possible combination.