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Conpressed, Direct Child Info, Word Tracking, Lexicon Data Structure, ADTDAWG?

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Old 10-25-2009
Conpressed, Direct Child Info, Word Tracking, Lexicon Data Structure, ADTDAWG?
Hello,

Back in late August 2009, I decided to start working on a modification of the traditional Directed Acyclic Word Graph data structure.

End Of Word Nodes did not match up with single words, and Child Information had to be discovered through list scrolling. These were a heavy price to pay for a small data structure.

I made a series of observations that led me to the ADTDAWG.

- The Adamovsky Direct Tracking Directed Acyclic Word Graph -

I documented the project with full disclosure on the web page below...

Adamovsky Direct Tracking Directed Acyclic Word Graph - An Advanced Lexicon Data Structure

The construct has proved its value in a series of rigorous tests that I designed for it.

Do you have any comments about the structure?

All the Best,

HeavyJ
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LEARN ABOUT DEBIAN

pdb

PDB(4)																	    PDB(4)

NAME

       PDB - (Pilot Database) file format

SYNOPSIS

       #define dmDBNameLength	 32/* 31 chars + 1 null terminator */

       struct pdb_header {	 /* 78 bytes total */
	    char   name[ dmDBNameLength ];
	    Word   attributes;
	    Word   version;
	    DWord  create_time;
	    DWord  modify_time;
	    DWord  backup_time;
	    DWord  modificationNumber;
	    DWord  appInfoID;
	    DWord  sortInfoID;
	    char   type[4];
	    char   creator[4];
	    DWord  id_seed;
	    DWord  nextRecordList;
	    Word   numRecords;
       };

       struct pdb_rec_header {	 /* 8 bytes total */
	    DWord  offset;
	    struct {
		   int delete	 : 1;
		   int dirty	 : 1;
		   int busy	 : 1;
		   int secret	 : 1;
		   int category  : 4;
	    }	   attributes;
	    char   uniqueID[3];
       }

DESCRIPTION

       The  PDB (Pilot Database) file format is used by all models of the Palm Pilot and IBM Workpad.  The format consists of a header followed by
       a set of record headers followed by the records themselves.

   Word Sizes
       In the SYNOPSIS above, the types ``Byte,'' ``Word,'' and ``DWord'' are used just as in the Pilot headers.  The type  ``Byte''  is  8  bits;
       ``Word'' is 16 bits; ``DWord'' is 32 bits.  The latter two are in big-endian format.

CAVEATS

       1.  The C structures given in the SYNOPSIS above are illustrative and most likely will not work in actual C code since compilers align data
	   members on word boundaries.

       2.  The PDB file format presented here is not official and was written at the time when PDB file format was not public. It is possibly out-
	   dated.  The official standard is available on the Palm web page. (SEE ALSO)

SEE ALSO

       txt2pdbdoc(1), html2pdbtxt(1), pdbtxt2html(1), doc(4)

       Palm Computing Inc.  Palm File Format Specification, 2000.
       http://www.palmos.com/dev/support/docs/fileformats/front.html

AUTHOR

       Paul J. Lucas <pauljlucas@mac.com> Updated by Erik Schanze <eriks@debian.org>

txt2pdbdoc							  August 20, 2005							    PDB(4)