E-commerce services, namely facilitating purchasing transactions

Specifying print and electronic document behavior and associated content via a web interface, namely recording, maintaining and providing access to data regarding users' use of print and electronic documents and recording, maintaining and providing access to data regarding characteristics of print and electronic documents, including their content, subject matter, location, authorship and bibliographic information; providing access to and distribution of electronic information related to published print or electronic documents; providing access to and distribution of digital information associated with or related to books, magazines and other print or electronic publication, conferences, concerts and other events; calendaring services, namely providing interactive public calendars that allow multiple users to create and share event schedules; providing access to electronic purchasing services; determining information about document usage and readership, namely collecting, recording, storing, maintaining, analyzing and providing access to and distribution of data regarding readers' use and readership of documents, namely frequency of readership, amount of readership, sections of readership, areas of interest and other readership information and statistics; providing data and services responsive to document readership and reading behaviors, namely providing data and services related to content, theme or subject matter to user-submitted texts and portion of texts; specifying document behavior via markup, namely recording, maintaining, analyzing and providing access to and distribution of online commentary, annotations, user-generated comments, statistics, historical development and data on print or electronic documents