Attribute-value system
Below is a sample attribute-value system.  It represents 10 objects (rows) and five features (columns).  In this example, the table contains only integer values.  In general, an attribute-value system may contain any kind of data, numeric or otherwise.  An attribute-value system is distinguished from a simple "feature list" representation in that each feature in an attribute-value system may possess a range of values (e.g., feature  below, which has domain of {0,1,2}), rather than simply being present or absent