Matthew W. Thomas@feld @tonofcrates aren't those just the properties of epubs that, already exist?
I think the issue is that many people who make PDFs don't want flexibility, they want total control/consistency of the end product (and PDFs are very good at that)
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.