:
<P>
 
<UL>
<TT>1.</TT> The file architecture, which must be DAS
<BR><BR></UL>
<UL>
<TT>2.</TT> The file type, which must be recognized as one derived from the DLA format,
for example DSK
<BR><BR></UL>
<UL>
<TT>3.</TT> The DLA format version
<BR><BR></UL>
<BR><BR>
<A NAME="DLA Forward and Backward Pointers"></A>
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<H3> DLA Forward and Backward Pointers
</H3><P><BR><BR>
   The segments of a DLA file are organized as a doubly linked list. The
   DLA fi