Enterprise COBOL for z/OS V4.2 Programming Guide

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Enterprise COBOL for z/OSProgramming GuideVersion4Release2SC23-8529-01
Page 1: Enterprise COBOL for z/OSProgrammin
Page 6 and 7: Arithmetic comparisons (relation co
Page 8 and 9: Using file status keys. . . . . . .
Page 10 and 11: Choosing the DYNAM or NODYNAM compi
Page 12 and 13: Using a century window . . . . . .
Page 14 and 15: xiiEnterprise COBOL for z/OS V4.2 P
Page 16 and 17: |||79. Structure of instance method
Page 18 and 19: Term usedz/OS UNIX ®Long formz/OS
Page 20 and 21: ►► required_item ▼ repeatable
Page 22 and 23: vvvvvv- You can parse documents tha
Page 24 and 25: These guides describe how to use TS
Page 26 and 27: Chapter 4. Handling tables. . . . .
Page 28 and 29: Describing the output from sorting
Page 30 and 31: |||||||- CEE- CEH- CEL- CEQ- CEU- D
Page 32 and 33: vThe terms file in COBOL terminolog
Page 34 and 35: "A" Also "a""B" Also "b""C" Also "c
Page 36 and 37: Environment variable values that ar
Page 38 and 39: ecord in more detail. Use the READ
Page 40 and 41: Table 2. FILE SECTION entries (cont
Page 42 and 43: Recursive callsValue for num inLOCA
Page 44 and 45: To receive a parameter that was pas
Page 46 and 47: particular exception does not occur
Page 48 and 49: Start each declarative section with
Page 50 and 51: ...Procedure Division.Move Customer
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You do not need to declare a data i
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“Splitting data items (UNSTRING)
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Initializing a numeric (national de
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RELATED TASKS“Initializing a tabl
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RELATED CONCEPTS“Unicode and the
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Displaying values on a screen or in
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DISPLAY "ABC"DISPLAY "CDEF" WITH NO
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Storage and its addressabilityWhen
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Storage for external dataIn additio
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SVIndicates a sign, positive or neg
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You can move numeric-edited items t
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files, terminals, or printers. You
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Packed-decimal (COMP-3) itemsPACKED
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Data format conversionsWhen the cod
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NUMPROC(PFD)Given X'sd', where s is
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“Using arithmetic expressions”
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Table 10. Numeric intrinsic functio
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RELATED REFERENCES“ARITH” on pa
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Compute Todays-Value =FunctionPrese
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floating point. This is also true o
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Table 14. Hexadecimal values of the
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If a table is to contain only Unico
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Example: subscriptingThe following
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Indexing“Putting values into a ta
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Initializing a table (INITIALIZE)Yo
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In the example above, the VALUE cla
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Example: PERFORM and indexingThis e
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03 REC-2.05 FIELD-4 OCCURS 1 TO 5 T
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Searching a tableCOBOL provides two
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“Example: binary search”RELATED
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88 Enterprise COBOL for z/OS V4.2 P
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IF condition-qstatement-1ELSECONTIN
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object must correspond to a conditi
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Move "Adult Woman" To DescriptionWh
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Switch = "y". For example, the foll
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RELATED TASKS“Choosing inline or
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Looping through a tableYou can use
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Only that portion of the receiving
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vAction to be taken if all of the r
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4. Positions 31 through 33 (BBA) ar
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2. (Optional) Length of the desired
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“Example: arithmetic expressions
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DATA-2 before COUNTR after DATA-2 a
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01 R Pic x(20) Value "- 1234.5678".
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You can use a one-character substri
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v L evaluates to the value 5, the l
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120 Enterprise COBOL for z/OS V4.2
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“Processing UTF-8 data” on page
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Table 15. COBOL statements and nati
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One or more encoding units are used
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vNX'hexadecimal-digits'Each of the
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Where possible, use national groups
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01 Edited-date PIC NN/NN/NNNN USAGE
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Table 18. Encoding and size of alph
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Converting national to alphanumeric
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The following example converts Gree
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When you compare operands that have
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“Processing alphanumeric data ite
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Line-sequential file organizationLi
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Format for coding input and outputT
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The COBOL run time checks the conte
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The ASSIGN clause name can include
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RELATED CONCEPTS“Logical records
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vBlocked format-V records: CC + the
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Each block is preceded by a 4-byte
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If your program uses QSAM files on
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OPENREADInitiates the processing of
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To add records to a file opened as
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COBOL provides these ways for you t
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Some of the information about the Q
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Parameters for retrieving QSAM file
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RELATED TASKS“Processing new file
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Accessing HFS files using QSAMYou c
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Table 22. Handling of QSAM user lab
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Defining the ddname: Under z/OS, pr
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“Working with VSAM data sets unde
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Table 26. VSAM file organization, a
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RELATED TASKS“Creating alternate
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Because the concept of blocking has
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Table 29. I/O statements for VSAM s
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RELATED TASKS“Opening an empty fi
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RELATED TASKS“Opening an empty fi
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Sequential files are always written
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If you do not code a file status ke
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vvvvvvName of the catalog to contai
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MASTERA DD DSNAME=clustername,DISP=
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Sharing VSAM files through RLSBy us
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Table 33. Methods for improving VSA
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“Coding input-output statements f
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OPENREADWRITECLOSETo initiate the p
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If you do not close a line-sequenti
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“Improving sort performance with
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** Assign name for a working file i
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Coding the output procedureTo selec
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Sort or merge workDefine a minimum
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There is no maximum number of keys,
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To sort on a windowed date field, u
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“FASTSRT requirements for JCL”
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Table 34. Methods for checking for
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Code control statements between col
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RELATED REFERENCES“CICS SORT appl
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Language Environment Debugging Guid
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The following figure shows the flow
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Using the end-of-file condition (AT
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Follow these rules for each file:v
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This example also illustrates how o
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The FILE-CONTROL entry for the mast
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COMPILE . . . . . . . . . . . . . .
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The simplest way to compile your pr
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“Example: JCL for compiling using
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* COMPILE, LINK EDIT AND RUN A COBO
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* GOPGM GO MEMBER NAME FOR LOAD MOD
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Prelink and link-edit procedure (IG
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jobname JOB acctno,name,MSGCLASS=1
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RELATED REFERENCES“Data sets used
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Alternative ddname 8-byte entry Nam
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Table 36. Compiler data sets (conti
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SYSOPTF DD DSNAME=dsname,UNIT=SYSDA
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RELATED REFERENCES“OBJECT” on p
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statement, the SYSOPTF options supe
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Table 39. Types of compiler output
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030200 PROGRAM-ID PROG3....039000 E
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Example: LANGUAGE option in a batch
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Messages and listings for compiler-
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SYSLIBSpecify paths to directories
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Only files with the suffix .cbl are
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eturned by the compiler is greater
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Compiling using scripts“MDECK”
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RELATED TASKSChapter 15, “Compili
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Specify the directory that contains
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Compiling OO applications in JCL or
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UNIX System Services User’s Guide
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When you are running an application
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|Table 45. Compiler options (contin
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Conflicting compiler optionsRELATED
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ADV option syntax►►ADVNOADV►
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|||||||||||||||||||||||||||||||||||
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If you specify the NOCICS option, a
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vXML GENERATE statements that speci
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Default is: NOCURRENCYAbbreviations
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the compiler produces a diagnostic
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DIAGTRUNCDIAGTRUNC causes the compi
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message. In general, a message IGYp
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RELATED REFERENCES“Conflicting co
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FLAGSTD option syntax►►NOFLAGST
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CEECBLDY as the target of the call
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LISTUse the LIST compiler option to
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and a suffix of .dek. For Enterpris
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NSYMBOL option syntax►►NATIONAL
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Internal decimal, signed: Low-order
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You can specify OPTFILE as a compil
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Abbreviations are: OUTThe MSGFILE r
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PGMNAME(LONGMIXED)Usage notesWith P
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Link-edit considerations: If all pr
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SIZEUse SIZE to indicate the amount
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SQL option syntax►►NOSQLSQL(″
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SSRANGE option syntax►►NOSSRANG
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Information needed to enable symbol
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For programs that are compiled usin
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TRUNC has no effect on COMP-5 data
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When you specify TRUNC(STD), the se
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||||vvvvvvvValidation of XML input
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YEARWINDOWRELATED REFERENCESLanguag
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In the IN/OF phrase, library-name i
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RELATED TASKS“Changing the header
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If a failing program is part of a l
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Finding uninitialized dataUse an IN
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USE FOR DEBUGGING ON ALL PROCEDURES
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message identifies the table or ide
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* Data Division statements = 287* P
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Table 50. Using compiler options to
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|ARITH(COMPAT)NOAWONOBLOCK0BUFSIZE(
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1 090000 display "After perform 410
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(2) Hexadecimal displacement from t
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Table 52. Symbols used in LIST and
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“Signature information bytes: mor
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Table 53. Signature information byt
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000436 SET (1)(2) (3) (5) (6)000F26
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(3) TGT fields for the base locator
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Example: XREF output: program-name
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000984 100-initialize-paragraph.000
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vvvvFILE SECTION of the DATA DIVISI
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Called programs that are processed
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When you use the integrated CICS tr
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||vvvvYou can keep nested programs
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vvvvvvvvvvvvvvFDFILEFILE-CONTROLINP
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THE-END.EXEC CICS RETURN END-EXEC.E
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Compiling with the DB2 coprocessor
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01 C1208.49 C1208-LEN PIC S9(4) USA
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Table 62. Compiler options required
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Code-page determination for string
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EXEC SQL and REPLACE or COPY REPLAC
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RELATED REFERENCES“DYNAM” on pa
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For proper execution of COBOL progr
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Writing mixed-language IMS applicat
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Move length of AIB to AIBRLENMove "
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vYou can run programs that reside i
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RELATED REFERENCESXL C/C++ Programm
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Table 63. Samples with POSIX functi
Page 468 and 469:
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The called COBOL program starts run
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Calling nested programs lets you cr
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RELATED TASKS“Canceling a subprog
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The following scenario shows that A
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In this case, with the CALL literal
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Calling nested COBOL programsBy cal
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The following table describes the c
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If you must call a COBOL DLL progra
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You can specify another entry point
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Determine which of these data-passi
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RELATED CONCEPTS“Storage and its
Page 494 and 495:
PROCEDURE DIVISION USING BY VALUE.
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Example: using pointers to process
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Passing return-code informationUse
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vvEach subprogram can control a sin
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Goback.End Program ef1write.Identif
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Page 506 and 507:
A DLL application is an application
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RELATED TASKS“Creating a DLL unde
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characters or less. For the purpose
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RELATED REFERENCES“DLL” on page
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#include #include #pragma linkage (
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MultithreadingTo use COBOL support
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RELATED CONCEPTSLanguage Environmen
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...WRITE rec FROM local-storage-ite
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Asynchronous signals: In a threaded
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|You can use the ENCODING, VALIDATI
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Accessing XML documentsBefore you c
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RELATED CONCEPTS“XML events” on
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RELATED REFERENCES“XMLPARSE” on
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||||||||||||Table 70. Result of pro
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XML-NAMESPACE-PREFIX and XML-NNAMES
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|||||||||||||||||||||||||||||||||||
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|||||||||||||||||||||||||||||||||||
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The root element of an XML document
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For XML documents that are containe
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Note that the XML parser generates
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RELATED TASKS“Processing UTF-8 da
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“Parsing XML documents with valid
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vvIf you set XML-CODE to the code p
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RELATED CONCEPTS“XML events” on
Page 558 and 559:
xml-document-length '.'When otherDi
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Sample XML documentThe sample XML d
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At the end of the segment, the pars
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|||||||||||||||||||||||||||||||||||
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|||||RELATED TASKS“Parsing XML do
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In the XML GENERATE statement, you
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namespace declared on the root elem
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A byte order mark is not generated.
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Move 'Mill Valley' to city of shipT
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with pointer posdElseString xml-nam
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vvvvThe definition of the data is n
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$654.00Very high!This generated XML
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The element names contain hyphens,
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“Defining a factory section” on
Page 588 and 589:
A number and colon with no method-n
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CLASS-ID paragraph for defining a c
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Environment division.Configuration
Page 594 and 595:
Table 79. Structure of instance met
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WORKING-STORAGE SECTIONA single cop
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client invokes debit using an objec
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Data division.Working-storage secti
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Defining a clientRELATED TASKSChapt
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The SOURCE-COMPUTER, OBJECT-COMPUTE
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You can also make one object refere
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See the example referenced below fo
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Table 82. Conformance of the return
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Instantiating COBOL classesTo insta
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A subclass inherits the methods and
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WORKING-STORAGE SECTION for definin
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Defining a factory sectionUse the F
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Table 84. Structure of factory meth
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vvvvThe Account class adds factory
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CheckingAccount class (subclass of
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TestAccounts client programcbl dll,
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RELATED TASKSChapter 16, “Compili
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Page 632 and 633:
defined as USAGE POINTER; do not us
Page 634 and 635:
Managing local and global reference
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Sharing data with JavaYou can share
Page 638 and 639:
The following example shows both ca
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RELATED TASKS“Coding interoperabl
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Table 91. Services that convert bet
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01 ex object reference JavaExceptio
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import javax.naming.Context;import
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Checkpoint records are written on t
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Writing single checkpoint records,
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When a deferred restart has been su
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The DDCKPNT DD statement defines a
Page 658 and 659:
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Millennium language extensions (MLE
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dates, but you prefer to use four-d
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2. Declare these two-digit dates as
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DATA DIVISION.FILE SECTION.FDFILE S
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and year-only date fields to be con
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If the century window is 1950-2049,
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vThe output from the UNDATE intrins
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Using sign conditionsSome applicati
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vvSubtracting a nondate from a date
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For example, if a date field is use
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Analyzing and avoiding date-related
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If you add a DATE FORMAT YYXXXX cla
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Using an optimal programming styleT
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Choosing efficient data typesChoosi
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vof the table, and this value does
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Optimization of duplicate itemsIn t
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Contained program procedure integra
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Important: Confer with your system
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Table 93. Performance-related compi
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Table 94. Performance-tuning worksh
Page 702 and 703:
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For example:COPY MEMBER1 OF COPYLIB
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vGeneral services such as starting
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Example: Language Environment calla
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RELATED CONCEPTS“Formats for nume
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Value of i + d Value of dValue of i
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ir5 has dmax decimal places, and wo
Page 718 and 719:
RANGEREMSUM1. Use the steps for MAX
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v- Any operand in either comparand
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(1) A variably located item: EMPLOY
Page 724 and 725:
When you increment the value of the
Page 726 and 727:
Page 728 and 729:
IGZCA2D syntaxTo use the IGZCA2D se
Page 730 and 731:
RELATED REFERENCES“DBCS notation
Page 732 and 733:
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||||||||||||||||||||||||||||||||||T
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|||Table 99. XML PARSE exceptions t
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|||Table 99. XML PARSE exceptions t
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||||Table 100. XML PARSE exceptions
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XML GENERATE exceptionsRELATED TASK
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If you specify the EXIT option with
Page 746 and 747:
Processing of INEXITThe INEXIT exit
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Processing of LIBEXIT with nested C
Page 750 and 751:
|||Table 108. LIBEXIT parameters (c
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|Table 111. ADEXIT processing (cont
Page 754 and 755:
|||||||||||||||||||||||||||||||||||
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|||||||||||||||||||||||||||||||||||
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||||||||||||||MSGEXIT failures:Cust
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|||||||||||||||||||||||||||||||||||
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|||||||||||||||||||||||||||||||||||
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|||||||||||||||||||||||||||||||||||
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01 JNI-RC pic S9(9) comp-5.* succes
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Type Field Record0046 AN_STMT Neste
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TypeDescriptionX’0038’ Source r
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Table 118. SYSADATA common header s
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Table 121. SYSADATA compilation uni
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Table 122. SYSADATA options record
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Table 123. SYSADATA external symbol
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Table 124. SYSADATA parse tree reco
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|Table 124. SYSADATA parse tree rec
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Table 125. SYSADATA token record (c
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COPY REPLACING record: X’0039’O
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Table 129. SYSADATA symbol record (
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Table 130. SYSADATA symbol cross-re
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Table 133. SYSADATA statistics reco
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Table 138. SYSADATA EVENTS FILE ID
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Page 840 and 841:
RELATED TASKS“Preparing to run IG
Page 842 and 843:
Preparing to run IGYTCARAAll files
Page 844 and 845:
Preparing to run IGYTCARBRun the IG
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IGYTSALE: nested program applicatio
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5. Product description6. Product un
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-Product code is invalid-Date of sh
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04 1100 19901110 003301 19901114 WE
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Language element or conceptASSIGNAU
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Language element or conceptORGANIZA
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Licensees of this program who wish
Page 862 and 863:
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* alphanumeric functionA function w
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case structureA program-processing
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the AND or the OR logical operator.
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that describes overall specificatio
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* digit positionThe amount of physi
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* end program markerA combination o
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logical record exists, or that an o
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indexed data-nameAn identifier that
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J2EE See Java 2 Platform, Enterpris
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main programIn a hierarchy of progr
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category numeric, internal floating
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* paragraphIn the PROCEDURE DIVISIO
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have been processed and are awaitin
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SSBCS See single-byte character set
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paragraph in which environment-name
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supports Unicode using UTF-16 inbig
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and V. The content of a zoned decim
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Debugging Guide, GA22-7560Programmi
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AMODE (continued)of EXIT modules 72
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CKPT keyword 231classdefining 564de
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compiler options (continued)SQLCCSI
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DATE FORMAT clause (continued)use f
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environment variables (continued)co
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function-pointer data item (continu
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Java (continued)arraysdeclaring 613
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MEDIAN intrinsic functionexample st
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numeric data (continued)internal fl
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performance (continued)optimizer (c
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RETURN statement (continued)with IN
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static callsexample 456making 450pe
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USING phrase (continued)PROCEDURE D
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XMLPARSE compiler optionchoosing th
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Enterprise COBOL for z/OS V4.2 Programming Guide

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