Instance specific key.

Hidden parameters can be added to the URL by using the parameter 'tn_parameters'.
The key is the facet URL-name. The value is the facet value that should be applied.

Important: double URL-encoding is required.

1. Build the parameter string — combining keys and values:

   • encode special characters inside values (spaces, +, &, =, etc.)
   • concatenate multiple values using a pipe (|)
     example: brand=Coca%20Cola%7CPepsi&volume=1L%7C1.5L

2. URL-encode the entire filter string — because the whole string is passed as a single query parameter value, encode it a second time:
   brand%3DCoca%2520Cola%257CPepsi%26volume%3D1L%257C1.5L

3. Append to the URL:
   ?tn_parameters=brand%3DCoca%2520Cola%257CPepsi%26volume%3D1L%257C1.5L

Hidden exclusion parameters can be added to the URL by using the parameter 'tn_parameters_except'.
This is used to exclude certain parameters from the results (show everything except specified parameters).
The key is the facet URL-name. The value is the facet value that should be applied.

Important: double URL-encoding is required.

1. Build the parameter string — combining keys and values:

   • encode special characters inside values (spaces, +, &, =, etc.)
   • concatenate multiple values using a pipe (|)
     example: brand=Coca%20Cola%7CPepsi&volume=1L%7C1.5L

2. URL-encode the entire filter string — because the whole string is passed as a single query parameter value, encode it a second time:
   brand%3DCoca%2520Cola%257CPepsi%26volume%3D1L%257C1.5L

3. Append to the URL:
   ?tn_parameters_except=brand%3DCoca%2520Cola%257CPepsi%26volume%3D1L%257C1.5L

The source of the request. See the article on the request source for more information.