Ifd:IfdDelta

The IfdDelta class.

Class attributes:
 * - string used in target population select applying LIKE case insensitive pattern to concept names. It is recommended DO NOT USE THE PARAMETER keeping it empty collecting all concepts and their relationships;
 * - date representation in format "YYYY.MM.DD hh:mm:ss" that limits delta population (specifies moment when the changes were started to be actual);
 * - list of language codes that limit representations of the delta population;
 * - list of global unique ids for contexts limiting relationships of the delta population (it is recommended to specify exactly one);
 * - list of concepts added or updated (including changes in names, descriptions, relationships) after date/time specified by timestamp and satisfying to the search_criteria;
 * - list of added or updated values;
 * - list of added or updated measures;
 * - list of relationships added or updated after date specified by timestamp and belonging to one of the concepts listed above