are allocated at
the positions aligned on page boundary. Page objects has no headers.
DyBASE distinguish page objects
with normal object by using special marker in object index.<P>


<H3> <A NAME = "logless">Shadow transaction mechanism</A></H3>

Each record (object) in DyBASE has unique identifier (OID).
Object identifiers
are used to implement references between objects. To locate object by
reference, its OID is used as index in array of object offsets within the file.
This array is called <I>object index