Data that's disparately located, varied in structure, voluminous, and rapidly changing.
Data (structured or unstructured) that's heterogeneously shaped, disparately
located, voluminous, and rapidly changing, such as the World Wide Web and the
many Data Spaces (e.g., feed-based Social Networks) it exposes. Same applies
to the burgeoning Internet of Things which is all about sensory data produced
by devices.