Select this checkbox if you want to allow the optional branch and revision attributes of the ivy.xml module descriptor to help calculate and filter the Jenkins project dependency graph. Leaving this option unchecked means that only the mandatory organisation and module attributes will be used when matching against the project ivy module descriptors. However it also means that if you have two or more projects configured in Jenkins using the same mandatory attribute values in their module descriptors, and another project defines a dynamic revision dependency on one of the modules, then all of the projects will match and will be considered upstream dependencies. This is usually not what you want if you are using Jenkins CI to build different versions (or different source code branches) of the same module at the same time, and selecting this checkbox can help avoid this problem.