The alignment is a way to build translation memories from previous translations by matching the corresponding segment pairs. Translation documents are segmented on import. Segmentation is a process of splitting the text contained in a translation document into segments, i.e. translation units. In most cases, the segments correspond to sentences and MemoQ is capable of performing the segmentation on its own. However, to accommodate specialties and deviations present in most languages, MemoQ allows users to modify the segmentation rules.