1. A computer program product, embodied in a computer-readable medium, the computer program product being operable to cause data processing apparatus to: a) receive, during a first time duration, a first electronic document being communicated between business entities, the first electronic document comprising instances of a plurality of business data elements, the first electronic document having a format corresponding to a business communication schema, wherein the business communication schema includes a set of predefined business data elements for use in electronically communicating business data from a first business entity to a second business entity; b) identify an instance of a particular business data element in the first electronic document; c) increment a counter associated with the particular business data element in response to identifying the instance of the particular business data element in the first electronic document; d) receive, during the first time duration, a second electronic document being communicated between business entities; e) identify an instance of the particular business data element in the second electronic document; f) increment the counter associated with the particular business data element in response to identifying the instance of the particular business data element in the second electronic document; g) subsequent to elapse of the first time duration, compare the counter with a threshold value; h) based on the counter being less than the threshold value, delete the particular business data element from the business communication schema; i) prior to deleting the particular business data element from the business communication schema, notify a user if the counter is less than the threshold value; j) receive an instruction from the user to remove the particular business data element from the business communication schema: k) reset the counter when the counter is at least equal to the threshold value; l) begin a second time duration upon resetting of the counter; and m) repeat operations b) through h) for a third electronic document being communicated between business entities during the second time duration.