Subversion - 如何将一些变更集从主干移动到分支？

We have a large project with several sub-projects. We're approaching a release of our project, and the new features in one sub-project are not going to be completed before the release as was originally planned. What I'd like to do is move all the changes to that sub project related to the new features into a separate branch to continue work for the next release, but I'm not sure how to best accomplish this.We have a large project with several sub-projec