A good example of a binary dictionary is the SEGY line header.
To see how DDS views these dictionaries, you need to convert it to a text
file by running any DDS application with parameter out= out_dict.
E.g.
bridge in= shots0001_0200.segy out= data_dict
The resulting output dictionary, data_dict, is a text file that
lists everything DDS knows about SEGY format and everything DDS finds in
the input line header. data_dict is also a text dictionary (an
elaborite one) that describes the binary file written by bridge.
By default, that file is named data_dict_@.
dds_history{= shots0001_0200.segy
data= shots0001_0200.segy
format= segy
dds_history}= shots0001_0200.segy
dds_history{= tmpDict_in1:
DDS_SENTRY= $Revision: 3.2 $ $Date: 2003/09/30 11:59:51 $
********************************************
******************* TITLE ******************
********************************************
cmd_title= "bridge, convert seismic data"
cmd_name= /usr/local/FreeDDS/DDS. ... /x86_64/bridge
cmd_rev= 43
cmd_user= mjo
cmd_date= Thu Apr 23 08:33:12 2009
cmd_host= Momo
cmd_cwd= /dat08/public/models/BPvel
cmd_pid= 5433
alias:sep_in= in
$size=
$origin=
$delta=
$units=
dds_history{= par:
cmd_args=
in= shots0001_0200.segy
out= data_dict
dds_history}= par:
fmt:SEGY_CHAR= typedef ebcdic1 SEGY_CHAR;
fmt:SEGY_SHORT= typedef integer2 SEGY_SHORT;
fmt:SEGY_INT= typedef integer4 SEGY_INT;
fmt:SEGY_TRACE_SPARE= typedef struct {SEGY_CHAR SpareGAP[2];
SEGY_SHORT SrcPnt, SoPtNm, RecInd, ShotNum, RefStatSrc,
RefStatGrp, LinInd;
SEGY_INT SrRcMX, SrRcMY, CDPBCX, CDPBCY;
SEGY_SHORT DstUsg, SrRcAz, SrcLoc, RecNum, FlReFN, CdpStatic,
RfSrEl, DePtEl, FlDtEl;} SEGY_TRACE_SPARE;
fmt:SEGY_TrcIdCode= typedef enum2 {SEGY_TrcIdCode_Seismic \= 1,
SEGY_TrcIdCode_Dead \= 2, SEGY_TrcIdCode_Dummy \= 3,
SEGY_TrcIdCode_TimeBrk \= 4, SEGY_TrcIdCode_Uphole \= 5,
SEGY_TrcIdCode_Sweep \= 6, SEGY_TrcIdCode_Timing \= 7,
SEGY_TrcIdCode_WaterBrk \= 8} SEGY_TrcIdCode;
fmt:GREEN_PREFIX= typedef void GREEN_PREFIX;
fmt:SAMPLE_TYPE= typedef float4ibm SAMPLE_TYPE;
fmt:SEGY_ADJUST= typedef enum4 {SEGY_CARD_PAD \= 0, SEGY_BINARY_PAD
\= 0, SEGY_TRACE_PAD \= 0} SEGY_ADJUST;
fmt:GREEN_SUFFIX= typedef void GREEN_SUFFIX;
fmt:SEGY_TRACE= typedef align(1) struct {GREEN_PREFIX green_prefix;
SEGY_INT LineTrcNum, ReelTrcNum, FieldRecNum, FieldTrcNum,
SrcPtNum, CdpNum, CdpTrcNum;
SEGY_TrcIdCode TrcIdCode;
SEGY_SHORT VertStack, HorzStack, DataUse;
SEGY_INT DstSgn, GrpElev, SrcElev, SrcDepth, GrpDatum, SrcDatum,
WatDepthSrc, WatDepthGrp;
SEGY_SHORT ElevScaler, XYScaler;
SEGY_INT SrcX, SrcY, GrpX, GrpY;
SEGY_SHORT XYUnits, WeathVel, SubWeathVel, UpholeTmSrc,
UpholeTmGrp, SrcStatic, GrpStatic, TotalStatic, LagTmBreak,
LagTmSrc, LagTmSmpOne, MuteStart, MuteEnd, TrcNumSmp,
TrcSmpInt, GainType, GainConst, GainInit, CorrFlag,
SwpFreqStart, SwpFreqEnd, SwpLength, SwpType, SwpTprStart,
SwpTprEnd, SwpTprType, AntiAliasFreq, AntiAliasSlope,
NotchFreq, NotchSlope, LowCutFreq, HighCutFreq, LowCutSlope,
HighCutSlope;
struct {SEGY_SHORT DateYear, DateDay, DateHour, DateMin, DateSec;}
Date;
SEGY_SHORT DateType, TrcWeight, RollSwtch1, RollTrace1,
RollTraceN, RollGapSize, OverTravel;
union {unsigned1 I1[60];
integer2 I2[30];
integer4 I4[15];
float4 F4[15];
float4ibm F4ibm[15];
SEGY_TRACE_SPARE Hdr;} Spare;
SAMPLE_TYPE Samples[axis_size(1)];
unsigned1 segy_trace_pad[SEGY_TRACE_PAD];
GREEN_SUFFIX green_suffix;} SEGY_TRACE;
fmt:SEGY_UnitsFlag= typedef enum2 {SEGY_UnitsFlag_meters \= 1,
SEGY_UnitsFlag_feet \= 2} SEGY_UnitsFlag;
fmt:SEGY_FmtCode= typedef enum2 {SEGY_FmtCode_float4ibm \= 1,
SEGY_FmtCode_integer4 \= 2, SEGY_FmtCode_integer2 \= 3,
SEGY_FmtCode_integer2a \= 4, SEGY_FmtCode_float4 \= 5,
SEGY_FmtCode_integer1 \= 8} SEGY_FmtCode;
fmt:SEGY_USHORT= typedef unsigned2 SEGY_USHORT;
fmt:SEGY_BINARY= typedef struct {GREEN_PREFIX binary_green_prefix;
SEGY_INT JobNum, LineNum, ReelNum;
SEGY_USHORT NumTrc, NumAux, SmpInt, OrigSmpInt, NumSmp,
OrigNumSmp;
SEGY_FmtCode FmtCode;
SEGY_SHORT CdpFold, SortCode, VertSumFlag, SwpFreqStart,
SwpFreqEnd, SwpLength, SwpCode, SwpChan, SwpTprStart,
SwpTprEnd, SwpTprType, CorrFlag, GainFlag, AmpFlag;
SEGY_UnitsFlag UnitsFlag;
SEGY_SHORT PolarityFlag, VibLagFlag;
union {unsigned1 I1[240];
integer2 I2[120];
integer4 I4[60];
float4 F4[60];
float4ibm F4ibm[60];} SpareBin;
SEGY_SHORT SegyFmt, FixedLength, NumHdr, Unassigned;
union {unsigned1 I1[92];
integer2 I2[46];
integer4 I4[23];
float4 F4[23];
float4ibm F4ibm[23];} Spare2Bin;
unsigned1 segy_binary_pad[SEGY_BINARY_PAD];
GREEN_SUFFIX binary_green_suffix;} SEGY_BINARY;
fmt:SEGY_CARD= typedef struct {GREEN_PREFIX card_green_prefix;
SEGY_CHAR card3200[40][80];
unsigned1 segy_card_pad[SEGY_CARD_PAD];
GREEN_SUFFIX card_green_suffix;} SEGY_CARD;
fmt:SEGY_FLOAT= typedef float4ibm SEGY_FLOAT;
fmt:PREAMBLE= typedef SEGY_CARD PREAMBLE;
fmt:PREAMBLE2= typedef SEGY_BINARY PREAMBLE2;
fmt:SEQUENCE= typedef SEGY_TRACE SEQUENCE;
fmt:segy= typedef SEGY_CARD PREAMBLE;
typedef SEGY_BINARY PREAMBLE2;
typedef SEGY_TRACE SEQUENCE;
alias:fmt:SEGY_TRACE_PAD= fmt:SEGY_ADJUST
alias:fmt:SEGY_BINARY_PAD= fmt:SEGY_ADJUST
alias:fmt:SEGY_CARD_PAD= fmt:SEGY_ADJUST
segy_card3200=
"C 1 shots0001_0200.segy"
"C 2 Input data: shoth 1 to 200"
"C 3 axis t x shot"
"C 4 size 2001 1201 200"
"C 5 origin 0 0 1"
"C 6 delta 0.006 12.5 1"
"C 7 unit sec m number"
"C 8 First trace(1) of each shot is max offset (x \= xshot - 15km)"
"C 9 Last trace(1201) of each shot is zero offset (x \= xshot - 0)"
"C 10 Shot interval is 50m | XYScaler\=-10 | ElevScaler\=-10"
"C 11"
"C 12 BP 2004 Velocity Benchmark"
"C 13"
"C 14 Read full disclaimer provided with the data."
"C 15"
"C 16 You accept the material as is and assume all responsability"
"C 17 for the results or use of the material. Any use which you"
"C 18 make of the materials is at your own risks."
"C 19"
"C 20 BP provides no warranties to you, expressed, implied or statutory,"
"C 21 including any implied warranties of fitness for a particular purpose."
"C 22"
"C 23 You agree that if you share any or all of this data with any other"
"C 24 person or organization, you will also include all of the associated"
"C 25 documentation originally included with the data and provided to you."
"C 26"
"C 27 In no event will BP be liable for any damages, including direct,"
"C 28 indirect, special, incidental or consequential damages arising out"
"C 29 of anyone's use of or inability to use these materials, or any copies"
"C 30 prepared from these materials, even if BP has been advised as to the"
"C 31 possibility of such damages."
"C 32"
"C 33 If you use this data in a publication or presentation, you must reference"
"C 34 that it was provided courtesy of BP, and acknowledge BP and Frederic"
"C 35 Billette."
"C 36"
"C 37 Contact"
"C 38 Frederic Billette"
"C 39 BP America"
"C 40 billetfj@bp.com"
segy_ReelNum= 1
segy_NumTrc= 1201
segy_SmpInt= 6000
segy_NumSmp= 2001
segy_FmtCode= 1
segy_UnitsFlag= 2
segy_SpareBinI2=
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
segy_FixedLength= 1
segy_Spare2BinI2=
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0
previous_history="C 1 shots0001_0200.segy"
previous_history="C 2 Input data: shoth 1 to 200"
previous_history="C 3 axis t x shot"
previous_history="C 4 size 2001 1201 200"
previous_history="C 5 origin 0 0 1"
previous_history="C 6 delta 0.006 12.5 1"
previous_history="C 7 unit sec m number"
previous_history="C 8 First trace(1) of each shot is max offset (x \= xshot - 15km)"
previous_history="C 9 Last trace(1201) of each shot is zero offset (x \= xshot - 0)"
previous_history="C 10 Shot interval is 50m | XYScaler\=-10 | ElevScaler\=-10"
previous_history="C 11"
previous_history="C 12 BP 2004 Velocity Benchmark"
previous_history="C 13"
previous_history="C 14 Read full disclaimer provided with the data."
previous_history="C 15"
previous_history="C 16 You accept the material as is and assume all responsability"
previous_history="C 17 for the results or use of the material. Any use which you"
previous_history="C 18 make of the materials is at your own risks."
previous_history="C 19"
previous_history="C 20 BP provides no warranties to you, expressed, implied or statutory,"
previous_history="C 21 including any implied warranties of fitness for a particular purpose."
previous_history="C 22"
previous_history="C 23 You agree that if you share any or all of this data with any other"
previous_history="C 24 person or organization, you will also include all of the associated"
previous_history="C 25 documentation originally included with the data and provided to you."
previous_history="C 26"
previous_history="C 27 In no event will BP be liable for any damages, including direct,"
previous_history="C 28 indirect, special, incidental or consequential damages arising out"
previous_history="C 29 of anyone's use of or inability to use these materials, or any copies"
previous_history="C 30 prepared from these materials, even if BP has been advised as to the"
previous_history="C 31 possibility of such damages."
previous_history="C 32"
previous_history="C 33 If you use this data in a publication or presentation, you must reference"
previous_history="C 34 that it was provided courtesy of BP, and acknowledge BP and Frederic"
previous_history="C 35 Billette."
previous_history="C 36"
previous_history="C 37 Contact"
previous_history="C 38 Frederic Billette"
previous_history="C 39 BP America"
previous_history="C 40 billetfj@bp.com"
axis= t x y
io_rank= 2
size.t= 2001
origin.t= 0.
delta.t= 0.006
units.t= sec
sort.t= ?
size.x= 1201
origin.x= 0.
delta.x= 1.
units.x= feet
sort.x= CdpTrcNum
size.y= 200
origin.y= 0.
delta.y= 1.
units.y= feet
sort.y= FieldRecNum
dds_history}= tmpDict_in1:
$old_format=format
format=segy
data= /dat08/public/models/BPvel/data_dict_@
fmt:SEGY_TrcIdCode= typedef enum2 {SEGY_TrcIdCode_Seismic \= 1,
SEGY_TrcIdCode_Dead \= 2, SEGY_TrcIdCode_Dummy \= 3,
SEGY_TrcIdCode_TimeBrk \= 4, SEGY_TrcIdCode_Uphole \= 5,
SEGY_TrcIdCode_Sweep \= 6, SEGY_TrcIdCode_Timing \= 7,
SEGY_TrcIdCode_WaterBrk \= 8} SEGY_TrcIdCode;
fmt:SEGY_ADJUST= typedef enum4 {SEGY_CARD_PAD \= 0, SEGY_BINARY_PAD
\= 0, SEGY_TRACE_PAD \= 0} SEGY_ADJUST;
fmt:SEGY_UnitsFlag= typedef enum2 {SEGY_UnitsFlag_meters \= 1,
SEGY_UnitsFlag_feet \= 2} SEGY_UnitsFlag;
fmt:SEGY_FmtCode= typedef enum2 {SEGY_FmtCode_float4ibm \= 1,
SEGY_FmtCode_integer4 \= 2, SEGY_FmtCode_integer2 \= 3,
SEGY_FmtCode_integer2a \= 4, SEGY_FmtCode_float4 \= 5,
SEGY_FmtCode_integer1 \= 8} SEGY_FmtCode;
fmt:SEGY_FLOAT= typedef float4 SEGY_FLOAT;
alias:fmt:SEGY_TRACE_PAD= fmt:SEGY_ADJUST
alias:fmt:SEGY_BINARY_PAD= fmt:SEGY_ADJUST
alias:fmt:SEGY_CARD_PAD= fmt:SEGY_ADJUST
map:*:segy.TrcNumSmp=2001
map:*:segy.TrcSmpInt=6000
map:in:out.TrcIdCode= TrcIdCode
map:in:out.ElevScaler= ElevScaler
map:in:out.XYScaler= XYScaler