Information Technology Reference
In-Depth Information
the table data is also marked with the ASCII string value “END”. Note, the table
or image data values themselves are in fact stored in binary (i.e. non-text) format
where additional “header” information is contained in fixed width ASCII strings.
7.3.2.2 Data Hierarchies
It is common to think of the structure of a data file as a tree of DVs and sub-
structures. XML is a classic example of storing data in a tree like structure where
an element may contain other child elements and they too may have children, and
so on - see Fig.
7.8
. Viewing data in such a way gives logical view of the data as a
Fig. 7.8
Data hierarchies
