| 摘要 |
The technologies allow a digital content developer to define, and a user to switch between or select, various versions of digital content for purposes of displaying, rendering, improving, or testing digital content. For example, a source code developer inserts identifiers in source code, and a source code layer viewer displays code segment choices defined by the identifiers. A user (e.g., the developer or others) selects code segments for inclusion in a source code version. The technology is also useful for providing versions of media content such as audio, video, DVD, images, text, etc.
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