A document is nothing more than a set of meta-data property values and an archive containing the corresponding full-text file

A document is a blob regarded as a black-box object

A document is a full-text document with the links to the other full-text documents

Very often, a document is a JASON object

A document is anything having internal structure and regarded as a white box

A document is a data aggregate with its internal structure made accessible for the API

A document within the Document Data Model could be queried using the property values from its internal structure

A document is the object containing all the metadata of a full-text document

A column storage is similar to a Key-Value storage. The difference is in the key structure

Column families in a columnar database are the basic units for specifying access control and rights for different user groups

A key in a Column Family Model contains: (i) table row number; (ii) table column identifier; (iii) column family identifier; (iv) time stamp of the value

The key values in a column database are lexicographically ordered

The Column Family Model is the mapping of a big 2+ dimensional table into one column

A Column Family Store is good for time-series data

Like in Relational model or in a spreadsheet, the Columnar Data Model supports only atomic data values that are placed in a cell of a table

Column Data Model is the extension of the relational Model to cope with time series

Column Data Storage stores different columns of the table at separate server nodes in a Cloud