1. A method of migrating objects from a source installation to a target installation, comprising: receiving input that selects a set of migrating objects, wherein the set of migrating objects is a set of objects at the source installation that are to be migrated to the target installation; from a first set of one or more system tables at the source installation, copying metadata that defines the selected set of migrating objects into a first set of transport tables at the source installation; exporting the metadata from the first set of transport tables at the source installation; importing the metadata that was exported from the first set of transport tables into a second set of transport tables at the target installation site; and merging the metadata from the second set of transport tables into a second set of one or more system tables at the target installation.