From [One Laptop per Child Community News 2006-09-23|http://laptop.media.mit.edu/laptopnews.nsf/2e76a5a80bc36cbf85256cd700545fa5/c56bbbefef74522b852571f2006db186?OpenDocument]

15. In a related effort, Ivan has frozen Verison 1.0 of the document format
used in the Journal (and wiki). The general datastore, differential storage
engine, and indexing engine are also largely finished. A WYSIWYG (what you
see is what you get) editor in progress, as well as a reference identity
service/emergent public key infrastructure implementation.