Recommendation parameters

List parameters are just a comma separated list of strings, defaulting to an empty list.

Type	Name	Default	Description
list	tags		Only include items which possess the specified tags
list	excludedTags		Exclude items which possess the specified tags
list	exclude		Exclude the items with the given IDs
list	items		For a database-related request (i.e. basket request), specifies the list of items to find related items to; for a normal database GET request, specifies which items should be returned (useful for getting information about a number of items at once)
boolean	showReferences	false	Show the "references" (back-links) for an item GET
list	ignore		Do not include or factor into ranking the listed IDs
boolean	excludeLinked	false (recommended) / true (related)	Don't include the items directly linked from the query item (i.e. products already purchased by a customer)
int	maxResults	20	The maximum number of recommended entries to return
boolean	includeProperties	false	Include the properties for the item as XML attributes in a related or recommended query
boolean	includeTags	false	Include the tags for the item as an XML attribute (comma separated) in a related or recommended query
list	include		Hand-pick the listed IDs for inclusion in a recommended or related query
string	tagOperation	OR	Specifies whether the list of tags specified in "tags" should be evaluated using a logical "or" or logical "and"
enum [ Add, Subtract, Replace ]	updateMethod	Replace	Specifies the behavior POSTed updates to items
list	itemsToRank		Ranks a specific set of items using the "related" method
float (0 .. 1.0)	popularity	-1.0 (automatic)	Skews results towards more niche or popular items