database.pl -- Storage of predicates in mongolog programs.

The following predicates are supported:

Predicate	Arguments
assert/1	+Head
retractall/1	+Head

author: - Daniel Beßler
See also: - https://www.swi-prolog.org/pldoc/man?section=dynpreds
license: - BSD

mongolog_add_predicate(+Functor, +Fields, +Options) is semidet

Register a predicate that stores facts in the database. Functor is the functor of a n-ary predicate, and Fields is a n-elemental list of keys associated to the different arguments of the predicate. Options is a list of optional paramers:

`indices(List)`	a list of indices passed to setup_collection/2
`collection(Collection)`	name of the collection where predicate is stored, default is to use the functor of the predicate

Current limitation: there cannot be predicates with the same functor, but different arity.

Arguments:

`Functor`	- functor of the predicate
`Fields`	- field names of predicate arguments
`Options`	- option list

mongolog_drop_predicate(+Functor) is det

Delete all facts associated to predicate with given functor.

Arguments:

Functor

- functor of the predicate