Leaf Selector
The Selectors of a Sitemap is a tree-like structure. A Leaf Selector in Tree is a node which DO NOT contain any childs.
An example of Selectors
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Selector like "keyword_4_p3_city_name", "keyword_4_p3_city_data" and "keyword_4_prefix" are Leaf Selectors.
The data captured by a Leaf Selector is completely depend on the selector itself and will never combine with data its siblings.
In this way, by setting a Data Filter on a Leaf Selector you are able to process the "clean data" without confusion.
The processed data of a Leaf Selector will send to its parent node and combine with data from other child nodes.
Before Data Filter:
After Data Filter:
For more details please check Data Filter