• ProvideX builds
keys on-the-fly.
• Exclusive access
to the file is required.
• Keys are assigned
the next available key number.
• When adding a
unique alternate key, the add generates an error and
the key is not defined if duplicate keys are in the
desired index.
• Only one key can
be added at any one time (ADD or DROP
cannot execute at the same time and will fail with an
error zero).
• The key names are
case insensitive (key will be converted to uppercase
characters).
• The first
character of the key name cannot be a "#"
as this is reserved for access to the keys by key
number.
• If a key name is
specified, it cannot be null; e.g., "".
• Spaces are valid
and significant. A name of " " (space) is
valid, and is not the same as a key of " "
(space space).