Amazon Product Advertising API Developer's Manual page 329

Product Advertising API Developer Guide
Value
reviewrank
SearchIndex: HealthPersonalCare
Value
salesrank
price
-price
titlerank
-titlerank
release-date
-release-date
SearchIndex: HomeGarden
Value
relevancerank
salesrank
price
-price
reviewrank
SearchIndex: HomeImprovement
Value
relevancerank
salesrank
price
Sort Values for CN
Description
Average customer review: High to low
Description
Best to worse selling
Price: Low to high
Price: High to low
Alphabetical: A to Z
Alphabetical: Z to A
Release date: Older to newer
Release date: Newer to older
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
Price: Low to high
Price: High to low
Average customer review: 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
Price: Low to high
API Version 2011-08-01
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