| 摘要 |
A mechanism gives users meaningful access to information while protecting the interests of publishers and creators of information including text, graphics, photos, executable files, data tables, audio, video, and three dimensional data and allows a user to review a document while connected to a network but prevents the user from downloading, printing, or copying the document unless a fee is paid. The user is allowed to review documents at a first cost basis, but only provides other access to documents, such as copying, printing, or downloading on a second cost basis. The user is also allowed to purchase a selectable portion of a document at a price based on the amount of material selected where that amount of material can include a portion of a document, an entire document, or an anthology of components of multiple documents.
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