Unstructured Data (or
unstructured information) refers to information that either does not have a pre-defined
data model or is not organized in a pre-defined manner. Unstructured information is typically
text-heavy, but may contain data such as dates, numbers, and facts as well. This results in irregularities and
ambiguities that make it difficult to understand using traditional programs as compared to data stored in fielded form in databases or
annotated (
semantically tagged) in documents.