document: Value-based web caching Despite traditional web caching techniques , redundant data is often transferred over HTTP links . These redundant transfers result from both resource modification and aliasing . Resource modification causes the data represented by a single URI to change ; often , in transferring the new data , some old data is retransmitted . Aliasing , in contrast , occurs when the same data is named by multiple URIs , often in the context of dynamic or advertising content . Traditional web caching techniques index data by its name and thus often fail to recognize and take advantage of aliasing . Despite traditional web caching techniques , redundant data is often transferred over HTTP links . These redundant transfers result from both resource modification and aliasing . Resource modification causes the data represented by a single URI to change ; often , in transferring the new data , some old data is retransmitted . Aliasing , in contrast , occurs when the same data is named by multiple URIs , often in the context of dynamic or advertising content . Traditional web caching techniques index data by its name and thus often fail to recognize and take advantage of aliasing .
doc_bio_tags: O O B O O O B O O O O O O O O B O O O B I O O O B I O B O B I O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O B O O O O B O O O O O O O O B O O O B I O O O B I O B O B I O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O B O