Why Are There Two Versions of Some Guides?

Bookshelf for Oracle's Siebel eBusiness Applications
Version 7.5.x

This Bookshelf contains two versions—both v7.5.3 and v7.5.2—of some titles.
In the 7.5.3 version of these duplicate titles, some portion of the v7.5.3-specific information supercedes that which is documented in the v7.5.2 guide. Therefore, to support all Siebel 7.5.x customers, we have included both the updated v7.5.3 guide and the original v7.5.2 guide. Version 7.5.3 feature changes are listed in the Revision History of the v7.5.3 guide.
Use the version numbers following the title of the guide to access the different versions of duplicate titles.
Siebel 7.5.2 customers should note that while the v7.5.3 information does not apply to their deployment, all other material in the guide does apply. The v7.5.3 guides contain numerous quality enhancements and improvements that are relevant to all Siebel v7.5.x customers.

What if There Is Only a v7.5.3 Guide Provided?
If there is only a v7.5.3 guide provided, then it is applicable to all Siebel v7.5.x customers. The v7.5.3-specific information is described in the Revision History of each guide.
Siebel 7.5.2 customers should note that while the v7.5.3 information does not apply to their deployment, all other material in the guide does apply. The v7.5.3 guides contain numerous quality enhancements and improvements that are relevant to all Siebel v7.5.x customers.