Since this project got started long before TEI P5 was finalized, it uses a slightly obsolete pre-release version of the standard. It also depends on the inclusion of SVG for image markup. It's now time to move forward to the current P5 standard, so I've begun building a system for doing that. The first stage is a new schema: for that, I've taken the imt_1_7 schema and renamed it to mariage.rng. Next, I've created two XSLT files, one taken from the IMT, and one custom-written, to convert the image markup files and the text markup files to standard P5. This is all now working, and I have a set of working files which we can use in building the next version of the site.