12. An augmentation system, comprising: an electronic device having a display screen operable to display a portion of a reference document using a first display layer and augmented content using a second display layer, the electronic device operable (i) to allow user interaction with the portion of the reference document for selection of a reference topic to be augmented, and (ii) to communicate with a remote server, wherein the reference document includes digital data information stored locally on the electronic device or via the remote server, wherein the augmented content is generated using a set of features extracted from the reference document, a set of discovery patterns and a causality graph, wherein the set of discovery patterns is dynamically generated based on context aware competency questions relevant to content of the reference document and a ranking engine configured to prune out a portion of the set of features extracted from the reference document, wherein the causality graph is generated using (i) a set of prior topics that are relevant to content of the reference document, (ii) the reference topic to be augmented, (iii) a set of at least two causal relationships, (iv) a set of actors relevant to the set of at least two causal relationships, (v) a set of topics and a set of categories associated with the set of topics, and (vi) the set of discovery patterns, and wherein at least a portion of the causality graph is updated using a timeline.
16. The augmentation system of claim 12 , wherein the augmented content include a set of local augmentation and a set of global augmentation.