| 摘要 |
Methods, apparatuses and systems directed to methods of controlling access to one or more items of network content referenced within a structured document such as an RSS feed. Embodiments of the invention are particularly suited to podcasting, where the access control is based on monetary payment, presentation of coupons or other promotional devices, or other forms of web commerce; or may limit the duration of accessibility of the content, the number of times it can be downloaded, or other characteristics of access.
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