Technologies

XML 

main topic

Namespaces 

usual suspect

HTLM5 

natural extension

XPath 

to locate modification

JSON 

extension topic

RDF 

to record information

Dublin core 

to record for provenance metadata, along with any comments about a change.

XQuery Update 

as an inspiration of an "update" language

EXI 

to stay compatible with

EPUB 

to try to apply to EPUB

OOXML 

how do the provisions change-tracking work already, how can a CTMarkup solution be applied or adapted and is that in scope for CTMarkup?

ODF 

how do provisions for change-tracking work already, how can a CTMarkup solution be applied or adapted and is that in scope for CTMarkup?

Coordination

accessibility 

we have keep the information accessible

security 

we have to consider security (of what ?)

internationalization 

we have to consider internationalization of the content

DPub ( http://www.w3.org/dpub/ ) 

keep in synch