Examples of human-generated unstructured data:
- text files
- email
- social media
- websites
- mobile data
- media: audio files, video files, digital photos

Examples of machine-generated unstructured data:
- satellite imagery
- scientific data
- digital surveillance
- sensor data

University of Michigan - Ann Arbor

Unstructured data either does not have a pre-defined data model or is not organized in a pre-defined manner. It has internal structure but is not structured via pre-defined data models or schema. Unstructured data may be textual or non-textual, and human- or machine-generated. It may also be stored within a non-relational database like NoSQL.

Unstructured Data

https://www.datamation.com/big-data/structured-vs-unstructured-data.html

Structured Data vs. Unstructured Data

Examples of Unstructured Data

Images for cat recognition is an example of “structured” data, because it is represented as a structured array in a computer. True/False?

A demographic dataset with statistics on different cities' population, GDP per capita, economic growth is an example of “unstructured” data because it contains data coming from different sources. True/False?

Though classification algorithms succeed in ignoring background data for the sake of efficiency, most tasks require a complete understanding of input data, and are thus more computationally expensive. Modeling a distribution with a lookup table in the absence of other processing creates issues of memory and efficiency.
These issues can be minimized through identifying and only modeling direct - and not indirect - interactions between variables, i.e. Structured Modeling.

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