Syntactic metadata at the directory and inventory levels are generally subsets of that at the data level.
For example, at the data level syntactic
metadata generally includes complex data types such as byte arrays or
real sequences as well as simple ASCII text.
While at the directory level syntactic
metadata generally consists of little more than simple ASCII text.
As an aside, the syntactic metadata required for a web browser is
very simple: ASCII as text or GIF images.