Amazon Product Advertising API Developer's Manual page 331

Product Advertising API Developer Guide
SearchIndex: Music
Value
relevancerank
salesrank
price
-price
titlerank
-titlerank
orig-rel-date
-orig-rel-date
SearchIndex: OfficeProducts
Value
relevancerank
salesrank
reviewrank
price
-price
SearchIndex: Photo
Value
relevancerank
salesrank
Sort Values for CN
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Best to worst selling
Price: Low to high
Price: High to low
Alphabetical: A to Z
Alphabetical: Z to A
Original release date: earliest to latest
Original release date: latest to earliest
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Best to worst selling
Average customer review: High to low
Low to high
High to low
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Best to worse selling
API Version 2011-08-01
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