Item Segmentations
Item Segmentation is an abstraction on top of the catalog of Items. It allows you to group the Items into Segments based on their properties. The Segments can be then recommended to your users.
It is common to Segment the Items by:
- category or brand in the case of products
- genre in the case of movies
- artist in the case of songs
- belonging to particular homepage rows - see this section for other advanced use cases
Recommend Item Segments To User can be then used to recommend the top brands / top artists or actors / top categories or genres for a particular user.
It is also possible to get related Segments to a particular item (e.g. brands related to a product, artists related to a song), Segments related to another Item Segment (e.g. artists similar to a particular artist, brands related to a brand), or search within the Segments (search brands, artists, etc. with a search query).
A step-by-step video tutorial on Item Segmentations
Creating an Item Segmentation
There are multiple ways a Segmentation can be defined.
The most frequently used and the easiest to set up is Property-based Segmentation.
See this section for info on more advanced options for creating the Segmentations.
Property-based Segmentation
Property-based Segmentation groups the Items by the value of a particular property.
The property can be of string
or set
type.
NULL
values are ignored.
Examples
Consider the following data about the Items:
Example 1
Segmentation based on the country
property (of type string
) will create the following three Segments:
For example, the value of the country
property for the it_crowd is GB
, and
therefore the it_crowd belongs to the
GB
Segment.
Example 2
Segmentation based on the genres property
(of type set
) will create the following three Segments:
Note that an Item can belong to multiple Segments: In that case, the_silence_of_the_lambs belongs to both
Horror
and Thriller
Segments.
Creating in the Admin UI
- Navigate to the Segmentations section
- Create a new Segmentation of the Property-based type and select by which Item property the Items shall be segmented.
- Check the preview of the resulting Segments and confirm the setup
Creating via the API
- Call the Create Property Based Segmentation endpoint.
Recommending Segments
Requesting recommendations
The Segments can be recommended or searched using the following endpoints:
- Recommend Item Segments To User
- Recommend Item Segments To Item
- Recommend Item Segments To Item Segment
- Search Item Segments
Before you can use any of that endpoints, you need to create an Item Segmentation and then set up a Scenario in the Admin UI which will use that Segmentation.
The ID of that Scenario needs to be provided in the scenario
parameter
of the recommendation request:
client.send(
new recombee.RecommendItemSegmentsToUser('2c169e575644d840838e', 5, {
scenario: 'top_categories',
cascadeCreate: true,
}),
(err, recommended) => {
//...
},
);
recommended = client.send(RecommendItemSegmentsToUser('2c169e575644d840838e', 5,
scenario='top_categories',
cascade_create=True))
recommended = client.send(RecommendItemSegmentsToUser.new('2c169e575644d840838e', 5,
{
'scenario' => 'top_categories',
'cascadeCreate' => true
})
)
RecommendationResponse recommended = client.send(new RecommendItemSegmentsToUser("2c169e575644d840838e", 5))
.setScenario("top_categories")
.setCascadeCreate(true);
<?php
$recommended = $client -> send(new Reqs\RecommendItemSegmentsToUser('2c169e575644d840838e', 5,
[
'scenario' => 'top_categories',
'cascadeCreate' => true
])
);
?>
RecommendationResponse recommended = client.Send(new RecommendItemSegmentsToUser("2c169e575644d840838e", 5,
scenario: "top_categories",
cascadeCreate: true));
client.send(new rqs.RecommendItemSegmentsToUser('2c169e575644d840838e', 5,
{
'scenario': 'top_categories',
'cascadeCreate': true
}
),
(err, recommended) => {
//...
}
);
GET /myDb/recomms/users/2c169e575644d840838e/item-segments/?count=10&scenario=top_categories&cascadeCreate=true
These are some examples of how recommending Segments can be used on your website or in your app:
- Recommending the top genres/categories for a user, and re-ordering homepage rows accordingly
- Recommending the top brands for a user
- Recommending the top artists or actors for a user
Filtering and Boosting
Recommended Segments can be filtered or boosted using ReQL. You
can access the ID of a Segment in ReQL using 'segmentId'
.
Examples of filters:
-
Do not recommend the coupons category to the users
ReQL'segmentId' != "coupons"
-
Do not recommend horror movies to kids
ReQLif context_user["is_child_profile"] then 'segmentId' != "Horror" else true
Example of a booster:
-
Boosting the Editors Pick section
ReQLif 'segmentId' == "Editors Pick" then 2 else 1
Advanced options for creating the Segmentations
Manual ReQL Segmentation
With Manual ReQL Segmentation, you specify individual Segments of the Segmentation.
Each Segment is defined by a ReQL filter: Items passing the filter belong to the Segment.
Example
Consider the same data about the Items as in this section.
You can create an Item Segmentation where each Segment will represent one row on the homepage.
With defined Segments as follows:
Items get segmented in this way:
You will get the optimal order of these homepage rows for the particular user by calling the Recommend Item Segments To User endpoint.
Creating in the Admin UI
- Navigate to the Segmentations section
- Give the Segmentation a title, which gets translated into the Segmentation ID, and optionally also give a description
- Create the first Segment by giving it a name (which gets again translated into the Segment's ID) and providing the ReQL filter
- You can check which Items belong to the Segment by clicking on Preview items
- Click Add Segment to add another Segment
- When satisfied with the setup, click Create to confirm it
Creating via the API
- First, create an empty Segmentation using Create Manual ReQL Segmentation
- Then, add the individual Segments using Add Manual ReQL Segment
Auto ReQL Segmentation
Auto ReQL Segmentation is specified by a ReQL expression that for each Item returns a set of Segments to which the Item belongs.
The individual Segments don't need to be predefined in any way.
Examples
Example 1
The following expression returns the set of genres:
'genres'
For example, for johnny_english it
returns {"Comedy"}
and for the_silence_of_the_lambs it returns
{"Horror", "Thriller"}
.
Therefore it behaves the same as the Property-based Segmentation using the genres property:
Example 2
The following Segmentation put the Items into Segments according to
their genres and also adds a
Critically Acclaimed
Segment for items with
'critically_acclaimed' == true
.
'genres' + (if 'critically_acclaimed' then {"Critically Acclaimed"} else {})
For example, for johnny_english it
returns {"Comedy"}
, for friends it
returns {"Comedy", "Critically Acclaimed"}
, and for the_silence_of_the_lambs it returns {"Horror", "Thriller", "Critically Acclaimed"}
.
Example 3
The Segments of the following Segmentation are a combination of the Item's genres and country (British comedies, US thrillers, etc.).
map(lambda 'genre': 'genre' + "-" + 'country', 'genres')
For example, for johnny_english it
returns {"Comedy-GB"}
, for friends it
returns {"Comedy-US"}
, and for the_silence_of_the_lambs it returns
{"Horror-US", "Thriller-US"}
.
Creating in the Admin UI
- Navigate to the Segmentations section
- Create a new Segmentation of the Auto ReQL type
- Give the Segmentation a title, which gets translated into the Segmentation ID, and optionally also give a description
- Provide the ReQL expression which returns a set of Segments to which an Item belongs
- Check the preview of the resulting Segments and confirm the setup
Creating via the API
- Call the Create Auto ReQL Segmentation endpoint.