Querying models in correlation to each other

You can query one model in correlation to another model.

To do this, you start with an empty set of one of the available models, and add single entries by using additional query parameters. For details about empty sets and additional query parameters refer to the topic about Adding query parameters.

Examples:

To correlate resources with tags, you start with the feed that represents an empty set of resources and add single resources based on how these have been tagged.
To correlate resources with ratings, you start with the feed that represents an empty set of resources and add single resources based on how these have been rated.
To correlate tags with resources you start with the feed that represents an empty set of tags and add single tags based on the resources to which these tags have been assigned.
To correlate ratings with resources, you start with the feed that represents an empty set of ratings and add single ratings based on the resources to which these ratings have been assigned.

Note

You cannot correlate a model with itself. For example, the tag model query parameter tm_param is not supported for the tag model; equally, the rating model query parameter rtm_param is not supported the rating model, and so on. The only exception from this rule is to use the URI tm:name:related, which is listed under the topic about Other queries.

Correlating the resource model with other models

To correlate the resource model with other models, use the following parameters:

rm:empty&tmparam=tm:name:tag_name

This returns a feed that contains all resources that have been tagged with the tag tagname.
rm:empty&tmparam=tm:name:tag_name&rmparam=rm:type:type

This returns a feed that contains all resources that are registered with type schema type and that have been tagged with the tag tagname.
rm:empty&tmparam=tm:name:tag_name&rmparam=rm:category:category_name

This returns a feed that contains all resources that are registered under the category category_name and that have been tagged with the tag tag_name.

Correlating the tag model with other models

To correlate the tag model with other models, use the following parameters:

tm:empty&rmparam=rm:resource_uri

This returns a feed that contains all tags for a resource with the URI resource_uri.
tm:empty&rmparam=rm:resource_uri_1&rmparam=rm:resource_uri_2

This returns a feed that contains all tags for resources with the URIs resource_uri_1 or resource_uri_2.

Correlating the tag space model with other models

To correlate the tag space model with other models, use the following parameters:

tm:ts:empty&rmparam=rm:resource_uri

This returns a feed that contains all tag spaces for a resource with the URI resource_uri.
tm:ts:empty&rmparam=rm:resource_uri_1&rmparam=rm:resource_uri_2

This returns a feed that contains all tag spaces for resources with the URIs resource_uri_1 or resource_uri_2.
tm:ts:empty&rmparam=rm:type:type

This returns a feed that contains all tag spaces for resources registered with the type schema type.
tm:ts:empty&rmparam=rm:category:category

This returns a feed that contains all tag spaces for resources registered in category category.
tm:ts:empty&rmparam=rm:type:type_1&rmparam=rm:type:type_2

This returns a feed that contains all tag spaces for resources registered with the type schema type_1 or type_2.
tm:ts:empty&rmparam=rm:category:category_1&rmparam=rm:category:category_2

This returns a feed that contains all tag spaces for resources registered in category category_1 or category_2.

Correlating the rating model with other models

rtm:empty&rmparam=rm:resource_uri

This returns a feed that contains all ratings for a given resource with the URI resource_uri .
rtm:empty&rmparam=rm:resource_uri1&rmparam=rm:resource_uri2

This returns a feed that contains all ratings for a given resource with the URIs resource_uri_1 or resource_uri_2 .

Correlating the rating space model with other models

rtm: rs :empty&rmparam=rm:resource_uri

This returns a feed that contains all rating spaces for a given resource with the URI resource_uri.
rtm: rs :empty&rmparam=rm:resource_uri1&rmparam=rm:resource_uri2

This returns a feed that contains all ratings for a given resource with the URIs resource_uri_1 or resource_uri_2.
rtm: rs :empty&rmparam=rm:type:type

This returns a feed that contains all rating spaces for resources registered with the type schema type.
rtm: rs :empty&rmparam=rm:category:category

This returns a feed that contains all rating spaces for resources registered in the category category.
rtm: rs :empty&rmparam=rm:type:type_1&rmparam=rm:type:type2

This returns a feed that contains all rating spaces for resources registered with type schema type_1 or type_2.
rtm: rs :empty&rmparam=rm:category: category_1&rmparam=rm:category:category_2

This returns a feed that contains all rating spaces for resources registered in category category_1 or category_2.

Related information