Think about adding am amdSection with tecMD data into mets.xml to configure the viewer.
(maybe another METS-Element is more suitable)
base URLs to tiles,
Metadata in XHTML? which will be displayed in the viewer (saves from calling an extra MetadataServlet)
URL to METS file
Start image -> can be used for fast startup of the viewer (before parsing the mets file)
In Rostock we use the amd section to provide additional data, look at:
The DFG-Viewer is also configured this way, example file:
Another benefit: we could provide an XML Schema to validate the configuration.