Fragmentation

Slides XSLT 1.0 doesn't support it, but I use an XT extension to generate multiple slides from a single XML document. This gives me the ability to work with the slides as a whole, manipulating order and other features, while still generating more manageable fragments.
Messages A single message may come in from a single sender, but has an impact on a wide variety of recipient processes. By breaking down the message into internally-relevant components, transformations can efficiently send appropriate information to multiple recipients.
Parallel processing In some cases, this kind of fragmentation allows multiple processes to occur simultaneously, reducing the ability of a single process to delay the rest.