The invention relates to a semantic data acquisition, storage and presentation system comprising SentenceClasses wherein SentenceClasses comprise SentenceClassLabels and SentenceClassData, each such label in the form of a RelationalPhrase or an alias thereof, and data, for each class, organized in conformance with the class-defining relation, as expressed in the form of the RelationalPhrase. Instantiation of SentenceClasses, by replacing substitution variables in RelationalPhrases with associated items of SentenceClassData, produces Sentences that provides context to the instantiated items. The system of the invention also comprises methods and processes including for: acquiring, transforming and recording data; operating on SentenceClasses including forming new SentenceClasses; and instantiating, rendering and presenting Sentences in human or machine-readable format.