Inference on date time constraint expressions

A storage subsystem holding instructions executable by a logic subsystem of a computerized automated assistant system, the instructions comprising:

• instructions to receive an utterance associated with a domain;
• instructions to recognize, via a machine-learning trained speech recognition module, speech in the utterance;
• instructions to parse, via a previously-trained natural language processing module, the recognized speech;
• instructions to detect, via the previously-trained natural language processing module, one or more phrases in the parsed speech that relate to a date or time;
• instructions to transform, via an inference module, the one or more detected phrases into a constraint graph including one or more constraints associated with the date or time;
• instructions to generate a periodic set for each of the one or more constraints by determining, for that constraint, a period and a repeated interval;
• instructions to combine the one or more periodic sets;
• instructions to process, via a previously-trained machine learning module, the combined periodic sets to determine an action;
• and
• instructions to execute the action.

A computing system, comprising:

• a microphone configured to record human speech;
• a speech recognition machine configured to translate the recorded human speech to text;
• a date/time constraint machine configured to detect in the text one or more constraints associated with a date or time;
• the date/time constraint machine further configured to generate a periodic set for each of the one or more constraints associated with the date or time;
• the date/time constraint machine further configured to combine the one or more periodic sets;
• a dialogue manager machine configured to process the combined periodic sets to determine an action;
• and
• one or more machines configured to execute the action.