How to implement a custom field available for Views? I'm making my first steps authoring simple modules. I would like to make my life easier by implementing a custom field for taxonomy views, a field named: "Taxonomy term: Arbitrary ascendant" so that it gets a term's ascendant at the given hierarchy level, as returned by taxonomy_get_parents_all.

Similarly, for content Views, I would like to provide a field configuration that would allow for ascendant tests for any term on an entity.

Could anyone point me to the Views API functions that must be taken into account to make this module properly authored?
Try views.api.php 


  Describe hooks provided by the Views module.


&amp; Views hooks


  Hooks that can be implemented by other modules in order to implement
  the Views API.