Microsoft Word's document model is one with a flat structure consisting primarily of paragraphs, tables, and images. In Word documents there is no such thing as a structural division tag; there are only paragraphs which are formatted to look like divisions. If your XML document is based on a complex DTD with a hierarchy nested to many levels, some flattening has to occur at some point in the process of producing RTF. This is a limitation of MS Word. If your document is extremely complex, for example with blocks nested to many levels, or if your document is large (more than 100 pages), the publishing process requires a lot of processing time to flatten this out to a Word-friendly structure. Please take note of this in the first instance when troubleshooting an Export process.