SIS - Application Programmatic Interface, Reference Manual - ICS ...

SIS- Application Programmatic Interface, Reference Manual
the category given. The meta-category is defined by the name of the link and
the class of which it is pointing from. The answer set contains the system
identifiers of these objects.
If set_id is a positive integer, apply get_to_node_by_meta_category() on
each object in temporary set set_id.
int get_from_node_by_meta_category(int sessionID, int set_id, l_name fromcls,
l_name categ)
If set_id is 0, get all objects that are connected to the current node by links
pointing from them. Links must be instances of some link class that is instance
of the category given. The meta-category is defined by the name of the link
and the class of which it is pointing from. The answer set contains the system
identifiers of these objects.
If set_id is a positive integer, apply get_from_node_by_meta_category() on
each object in temporary set set_id.
int get_from_value(int sessionID, int set_id)
Get the objects that the link objects in temporary set set_id are pointing from.
The answer set contains the system identifiers of these objects.
If set_id is 0, apply get_from_value() on current node.
int get_to_value(int sessionID, int set_id)
Get the objects that the link objects in temporary set set_id are pointing to.
The answer set contains the system identifiers of these objects, or/and
primitive values.
If set_id is 0, apply get_to_value() on current node.
6.3.3 Logical expressions - Object set filtering
There are cases that you want to select some objects according to some condition. For
this reason API offers the following function:
int get_filtered(int sessionID, int set_id)
From all objects in the set set_id select only those object that satisfy a
condition that has been previously defined with the set_filter_cond() function,
described later. The answer set contains all these selected objects.
If set_id is 0, evaluate the condition for the current node and if it is true put
current node in answer set else return an empty set. The function returns
APIFail(-1) on error or the set identifier of the temporary set where the answer
is stored.
The condition used by get_filtered() function can be defined with the following
function:
int set_filter_cond(log_exp)
Define a logical expression that can be true of false for a specific object.
August 2002/v2.2.2 -18- ICS-FORTH