Specify a single CategoryID to restrict your query to a specific Guide category.
If the specified category ID doesn't match an existing category for the site, an invalid-category error message is returned. To determine valid categories:
Use
findItemsAdvanced from the
Finding API with CategoryHistogram value in the OutputSelector field to retrieve matching categories. Then make another FindReviewsAndGuides call with the ID of a matching category.
CategoryID can be used in combination with UserID to return Reviews and Guides. ProductID and CategoryID cannot be used together.