Version 1.0
2018-03-14: Initial version
Version 1.1
2018-05-15: replaced p@type='footer' with the TEI element trailer (see TEI documentation)
Version 1.2
2019-05-23: Encoding has to be declared in XML declaration
Version 1.3
2019-07-24: Allow normal text in running header
Version 1.4
2019-10-28: Use Cardo font for some characters, clearer space management.