Various implementations are directed to systems, apparatus, computer-implemented methods and storage media for identifying a target set of users of an enterprise network to which to distribute a communication of enterprise-related information. For example, when a communication system receives a request to distribute a communication, the communication system analyzes the communication to identify a set of enterprise users that are predicted to find the information in the communication relevant, and especially, relevant from the enterprise's perspective. For example, the communication system can include a machine learning system that can construct, update and maintain a machine learning model of induction. In some implementations, the machine learning system trains the machine learning model by identifying contextual features of previously distributed communications, user traits of recipients of the previously distributed communications, and actions or inactions that indicate whether the recipients found the information in the communications relevant.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A computer implemented method for updating a machine learning model for determining one or more decision boundaries, the method comprising: analyzing, by one or more computing systems, an enterprise-related user communication; determining, by the one or more computing systems, one or more contextual features for the user communication based on one or more of the content, subject, purpose, source, and recipients of the user communication; determining, by the one or more computing systems, one or more relevancy scores for each of one or more respective recipients of the user communication, each relevancy score based on actions taken or not taken by the respective recipients based on the communication, each relevancy score representing a relevance of enterprise-related information included with the communication to the respective recipient; determining, by the one or more computing systems, one or more user traits associated with the one or more recipients of the user communication; analyzing, by a machine learning system executing within the one or more computing systems, the one or more determined contextual features, the one or more determined relevancy scores and the one or more determined user traits associated with the one or more recipients; updating, by the machine learning system, a machine learning model based on the analysis of the one or more determined contextual features, the one or more determined relevancy scores and the one or more determined user traits, the machine learning model being stored in one or more databases accessible by the one or more computing systems, the updating including determining one or more relevancy values for the machine learning model based at least in part on the one or more determined relevancy scores and the one or more determined user traits; and determining one or more decision boundaries for the machine learning model based on the determined relevancy values, each decision boundary separating at least a portion of the machine learning model into a first class of user trait values having respective relevancy values above a threshold from a respective second class of user trait values having respective relevancy values below the threshold. 2. The method of claim 1, wherein: the machine learning model is an n-dimensional model including n dimensions for representing n respective user traits, each user trait including two or more possible user trait values; and each decision boundary is associated with one or more respective contextual features and crosses one or more of the n dimensions. 3. The method of claim 1, wherein updating the machine learning model includes: calculating one or more predicted relevancy values for one or more respective combinations of one or more contextual features and one or more respective user trait values or combinations of user trait values; and adding the predicted relevancy values to the machine learning model. 4. The method of claim 1, wherein determining the relevancy score for the user communication includes identifying a relevancy indicator for the user communication based on one or more respective actions or inactions of a respective one of the recipients of the user communication. 5. The method of claim 4, wherein identifying a relevancy indicator includes determining whether the recipient actively clicked or selected one or more of a “like,” “share,” “bookmark” or other positive feedback indicator button or GUI interactive element presented or displayed in conjunction with the user communication. 6. The method of claim 4, wherein identifying a relevancy indicator includes determining whether the recipient actively clicked or selected one or more of a “dislike” or other negative feedback indicator button or GUI interactive element presented or displayed in conjunction with the user communication. 7. The method of claim 4, wherein identifying a relevancy indicator includes determining one or more of whether the recipient opened the user communication, marked the user communication as read without opening it, or deleted the user communication without opening it. 8. The method of claim 4, wherein identifying a relevancy indicator includes determining one or more of whether the recipient shared, forwarded, or replied to the user communication. 9. The method of claim 4, wherein identifying a relevancy indicator includes determining one or more of whether the recipient bookmarked, archived, otherwise saved the user communication or information within the user communication. 10. The method of claim 4, wherein identifying a relevancy indicator includes determining one or more of whether or how the recipient responded to solicited feedback regarding the user communication. 11. The method of claim 4, wherein identifying a relevancy indicator includes determining one or more of whether the recipient began following a discussion concerning the user communication, subscribed to a group discussing the user communication, subscribed to a group to which the user communication pertains, stopped following a discussion concerning the user communication, unsubscribed to a group discussing the user communication, or unsubscribed to a group to which the user communication pertains. 12. The method of claim 4, wherein identifying a relevancy indicator includes performing one or more sentiment analysis techniques to identify a positive or negative user sentiment concerning the user communication. 13. The method of claim 4, wherein identifying a relevancy indicator includes determining whether the recipient installed or updated software included within or linked with the user communication. 14. The method of claim 4, wherein one or more of the relevancy indicators are weighted differently than other ones of the relevancy indicators in determining a relevancy score. 15. The method of claim 1, wherein one or more of the relevancy scores are weighted differently than other ones of the relevancy scores in determining a relevancy value. 16. The method of claim 1, wherein the one or more user traits include one or more demographic traits including one or more of: age, gender, race, ethnicity and cultural heritage. 17. The method of claim 1, wherein the one or more user traits include one or more psychographic traits including one or more of: personality traits, interests, lifestyle traits and opinions. 18. The method of claim 1, wherein the one or more user traits include one or more location traits including one or more of: geographic region of residence or work location, state of residence or work location, city of residence or work location, population density, type of business performed at a particular work location, and type of work performed at a particular work location. 19. The method of claim 1, wherein the one or more user traits include one or more employment traits including one or more of: position within employer, title of position, type of position, level within employee management hierarchy, and job responsibility or responsibilities. 20. The method of claim 1, wherein the one or more user traits include one or more technological traits including one or more of: type of computer, type of portable computing device, type of smartphone or other cellular phone, brand of computer or other device, type of operating system, and type of software or software version the user currently has installed. 21. A computer implemented method for using a machine learning model to identify a set of enterprise users to receive a communication, the method comprising: analyzing, by one or more computing systems, an enterprise-related user communication or a request to distribute an enterprise-related user communication; determining, by the one or more computing systems, one or more contextual features for the user communication based on one or more of the content, subject, purpose and source of the user communication; providing, by the one or more computing systems, the one or more determined contextual features to a machine learning model stored in one or more databases accessible by the one or more computing systems, the machine learning model including n dimensions for representing n respective user traits, each user trait having two or more possible values, the machine learning model further including a plurality of relevancy values associated with respective user trait values; identifying, by the one or more computing systems, a target set of enterprise users to receive the user communication, the identifying including, for each of one or more of the determined contextual features: determining, based on the relevance values in the machine learning model, one or more enterprise users of a plurality of candidate enterprise users that are associated with user trait values having respective relevancy values above a threshold; and selecting the determined one or more enterprise users as the target set of enterprise users; and distributing the user communication to the target set of enterprise users. 22. The method of claim 21, wherein: the machine learning model is an n-dimensional model including n dimensions for representing n respective user traits, each user trait including two or more possible user trait values; and the machine learning model further includes on or more decision boundaries, each decision boundary associated with one or more respective contextual features and crossing one or more of the n dimensions, each decision boundary separating a first set of one or more user trait values or combinations of user trait values having respective relevancy values above the threshold from a second set of one or more user trait values or combinations of user trait values having respective relevancy values below the threshold. 23. The method of claim 21, wherein distributing the user communication to the target set of enterprise users includes, for each user in the target set of enterprise users, causing the user communication to be displayed in a feed or list of communications associated with the user. 24. The method of claim 21, wherein distributing the user communication to the target set of enterprise users includes, for each user in the target set of enterprise users, sending the user communication in an email to the user. 25. The method of claim 21, wherein the one or more user traits include one or more demographic traits including one or more of: age, gender, race, ethnicity and cultural heritage. 26. The method of claim 21, wherein the one or more user traits include one or more psychographic traits including one or more of: personality traits, interests, lifestyle traits and opinions. 27. The method of claim 21, wherein the one or more user traits include one or more location traits including one or more of: geographic region of residence or work location, state of residence or work location, city of residence or work location, population density, type of business performed at a particular work location, and type of work performed at a particular work location. 28. The method of claim 21, wherein the one or more user traits include one or more employment traits including one or more of: position within employer, title of position, type of position, level within employee management hierarchy, and job responsibility or responsibilities. 29. The method of claim 21, wherein the one or more user traits include one or more technological traits including one or more of: type of computer, type of portable computing device, type of smartphone or other cellular phone, brand of computer or other device, type of operating system, and type of software or software version the user currently has installed. 30. The method of claim 21, wherein identifying the target set of enterprise users to receive the user communication also includes, for each of one or more combinations of two or more of the determined contextual features: determining, based on the relevance values in the machine learning model, one or more enterprise users of the plurality of candidate enterprise users that are associated with user trait values having respective relevancy values above the threshold; and selecting these determined one or more enterprise users to include in the target set of enterprise users. 31. A computer implemented method for determining relevancy values, the method comprising: analyzing, by one or more computing systems, an enterprise-related user communication; determining, by the one or more computing systems, a contextual feature for the user communication based on the user communication; determining, by the one or more computing systems, one or more relevancy scores for each of one or more respective recipients of the user communication, each relevancy score based on one or more behaviors of the respective recipients with respect to the communication; determining, by the one or more computing systems, one or more user traits associated with the one or more recipients of the user communication; and based on the determined contextual feature, the one or more determined relevancy scores and the one or more determined user traits, generating one or more predicted relevancy values for the contextual feature and one or more user trait values. 32. The method of claim 31, wherein generating the one or more predicted relevancy values includes generating one or more predicted relevancy values for one or more combinations of two or more contextual features.