System Center Service Manager : Introducing Management Pack Bundles
Historically, management packs have been comprised of a single XML file (either in XML format in a .xml file or in a binary representation in a signed .mp file). With the new version of the common System Center management pack infrastructure that ships in Service Manager, the definition of a management pack is being extended to include associated “resources” such as images, form assemblies, workflow assemblies, reports, T-SQL scripts, and more. The aggregation of the XML (or even multiple XMLs) plus its associated resources is called a “management pack bundle”.
System Center Service Manager : Introducing Management Pack Bundles