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SAS/ACCESS Interface to CA-IDMS Software: Reference |
The following sections describe which options to use to issue each of the CA-IDMS function calls: ACCEPT, BIND, FIND, OBTAIN, GET, IF, and RETURN.
Each box that appears below shows the required and optional information that needs to be specified in INFILE statement option variables. The INFILE statement option variables are SAS variables assigned in the INFILE statement.
For example, to generate the ACCEPT CURRENCY function call, you must first assign INFILE statement option variables by using FUNC=, RECORD=, and SEQUENCE=. Then you can give the variables the values ACCEPT, DEPARTMENT, and CURRENT, respectively. See the example below for a detailed description of the ACCEPT CURRENCY function call.
Note: The values of INFILE statement option variables remain set and are used for
each subsequent function call unless you override or reassign their values.
ACCEPT |
The db-key is a unique 4-byte identifier assigned to a record when the record is stored in the database. The db-key remains unchanged until the record is erased or the database is unloaded and reloaded. Any record in the subschema can be accessed directly using its db-key, regardless of its location.
Note: If other function calls to CA-IDMS
are made before you want to use the db-key again, it must be copied into another
variable. If the db-key is not needed for the next function call, it must
be blanked out, or its value will be used in the function call, which will
produce unexpected results.
To generate the ACCEPT CURRENCY <record-name|set|area> INTO DBKEY function call, specify these options:
And one of these options:
The following example shows the ACCEPT CURRENCY function call for the DEPARTMENT record. The numbers in the program correspond to numbered comments following the program.
infile empss01 idms func=func1 record=rec1 dbkey=key1 errstat=err sequence=seq1; . . . [1] func1 = 'ACCEPT'; [2] rec1 = 'DEPARTMENT'; [3] seq1 = 'CURRENT'; input; if err eq '0000' then do [4] put @1 'DBKEY OF RECORD = ' @19 key1; . . .
FUNC1 is assigned the value of ACCEPT. | |
REC1 is assigned the record name DEPARTMENT because you want the db-key of this record. Before you can issue an ACCEPT function call for a specific record, you must first establish currency on the record. | |
SEQ1 is set to CURRENT to indicate that you want the db-key of the DEPARTMENT record which is current of the run unit. | |
after successful execution of the the ACCEPT function call, KEY1 contains the db-key for the current DEPARTMENT record. The PUT statement prints the value of KEY1 on the SAS log. |
The following example shows the ACCEPT NEXT function call for the DEPT-EMPLOYEE set. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=func1 set=set1 dbkey=key1 errstat=err sequence=seq1; . . . [1] func1 = 'ACCEPT'; [2] set1 = 'DEPT-EMPLOYEE'; [3] seq1 = 'NEXT'; input; if err eq '0000' then do [4] put @1 'DBKEY OF RECORD = ' @19 key1; . . .
FUNC1 is assigned the function of ACCEPT. | |
SET1 is assigned the set name that is current of the run unit. If, for example, you have currency on the EMPLOYEE record, the ACCEPT NEXT causes the db-key of the next record in the DEPT-EMPLOYEE set to be returned from the function call to CA-IDMS. The next record in the DEPT-EMPLOYEE set could be either an EMPLOYEE record or a DEPARTMENT record, depending on your location in the set when the ACCEPT NEXT function call is issued. | |
SEQ1 is set to NEXT to indicate that you want the db-key from the next record in the DEPT-EMPLOYEE set. | |
after successful execution of the ACCEPT function call, KEY1 contains the db-key for the NEXT record. The PUT statement prints the db-key on the SAS log. |
You can now save the db-key to use now or later with the OBTAIN or FIND functions. Using the db-key gives you direct access to the record regardless of established currencies.
BIND |
To generate the BIND RECORD function call, specify these options:
The following code example shows the BIND RECORD function call. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=func1 record=recname . . . [1] func1 = 'BIND'; [2] recname = 'DEPARTMENT'; [3] input; . . .
FUNC1 is assigned the function of BIND. | |
RECNAME is assigned the value of DEPARTMENT because this is the record on which you want to perform the BIND RECORD. | |
This INPUT statement generates and submits the BIND RECORD function call to CA-IDMS. |
FIND and OBTAIN |
The FIND function locates a record in the database.
The OBTAIN function locates a record and moves the data from the record to
the input buffer. The FIND and OBTAIN functions have identical options so
they will be discussed together. There are six formats of the FIND and OBTAIN
functions. Each one will be described individually.
For an example program that locates records directly using CALC key values that have been stored in a SAS data set, see Example: Using the Trailing @ and the INPUT with No Arguments.
To generate the FIND|OBTAIN CALC record-name function call, specify these options:
To generate the FIND|OBTAIN CALC DUP record-name function call, include:
The following example shows a FIND CALC function call for the EMPLOYEE record followed by an OBTAIN CALC DUP for the same record. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=funct record=recname ikey=ckey keyoff=key0 errstat=stat sequence=seq ikeylen=klen; . . . [1] funct = 'FIND'; [2] recname = 'EMPLOYEE'; [3] ckey = '0101'; [4] key0 = 0; [5] klen = 4; [6] input; . . . [7] funct = 'OBTAIN'; [8] seq = 'DUP'; if stat eq '0000' then do [9] input @1 employee_id 4.0 @5 firstname $char10. @15 lastname $char15. @30 street $char20. @50 city $char15. @65 state $char2. @67 zip $char9. @76 phone 10.0 @86 status $char2. @88 ssnumber $char9. @97 startdate 6.0 @103 termdate 6.0 @109 birthdate 6.0; . . .
FUNCT is assigned the value of FIND. | |
RECNAME is assigned the name of the record that you want to access. In this example, the record is the EMPLOYEE record. | |
CKEY is assigned the character value of '0101', which is the value of the CALC key of the EMPLOYEE record you want to access. Upon successful execution of the FIND CALC function call, currency is set to the EMPLOYEE record with the employee ID number of 0101. The CALC key for the employee record is the employee ID. | |
KEYO is set to zero because the employee ID or the CALC key is at offset zero in the employee record. In other words, the employee ID is the first element in the employee record. | |
KLEN is set to 4, which is the length of the CALC key, the employee ID. | |
This INPUT statement generates and submits the FIND CALC function call to CA-IDMS. No SAS variables are created. The FIND function establishes currency but does not retrieve data. | |
FUNCT is set to OBTAIN to generate an OBTAIN CALC function call to CA-IDMS. | |
SEQ is set to DUP so the code will generate an OBTAIN CALC DUP function call. RECNAME, CKEY, KLEN, and KEYO are still set from the previous FIND CALC function call and do not have to be set. | |
This INPUT statement contains SAS
variables because the OBTAIN function call causes CA-IDMS to locate the specified
record and move the data associated with the record to the record buffer.
The INPUT keyword submits the generated function call, which, if successful, returns a record to the buffer. The remaining portion of the INPUT statement maps fields from the buffer to the program data vector. |
To generate the FIND|OBTAIN CURRENT OF <record|set|area> function call, specify these options:
And optionally use one of the following:
The following example shows a FIND CURRENT function call for the DEPARTMENT record. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=funct record=recname errstat=stat sequence=seq; . . . [1] funct = 'FIND'; [2] seq = 'CURRENT'; [3] recname = 'DEPARTMENT'; [4] input; . . .
FUNCT is assigned the value of FIND. | |
SEQ is assigned CURRENT so the function call to CA-IDMS will locate the current record of the specified record type, set, or area. In this example, the code is looking for the current record of the record type DEPARTMENT. | |
RECNAME specifies the name of the
record type that is to be accessed. In this example, the record is the DEPARTMENT
record.
You can use the AREA option or the SET option instead of the RECORD option with the FIND/OBTAIN CURRENT function to locate the current record of the named area or set, respectively. | |
This INPUT statement generates and submits the FIND CURRENT function call to CA-IDMS. |
To generate the FIND|OBTAIN DBKEY function call, specify these options:
And optionally:
The following example shows an ACCEPT NEXT function call, which acquires the db-key of a record. It is followed by an OBTAIN DBKEY function call, which uses the db-key acquired by the ACCEPT NEXT function call. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=funct dbkey=dkey errstat=stat sequence=seq; . . . [1] funct = 'ACCEPT'; seq = 'NEXT'; [2] dkey = ' '; input; . . . funct = 'OBTAIN'; [3] seq = ' '; [4] input @1 department_id 4.0 @5 department_name $char45. @50 department_head 4.0; . . .
FUNCT is assigned the value of ACCEPT to get the db-key for the next record, based on currency. | |
DKEY is set to blanks to receive
the new db-key.
After the ACCEPT function call has successfully executed, the db-key is returned to the DATA step in the DKEY variable. The db-key can be saved and used later to access the record directly. | |
The SEQ option is set to blanks because
it is not used with the OBTAIN DBKEY function call.
If the RECORD option is used with FIND/OBTAIN DBKEY, the db-key value must contain a db-key of the named record type. | |
The INPUT statement generates and submits the OBTAIN DBKEY function call. If successful, data returned to the buffer are mapped to the named variables. |
To generate the FIND|OBTAIN OWNER function call, specify these options:
The following example shows an OBTAIN OWNER function call. This example assumes currency is on an employee record occurrence. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=funct set=inset errstat=stat sequence=seq; . . . [1] funct = 'OBTAIN'; [2] seq = 'OWNER'; [3] inset = 'DEPT-EMPLOYEE'; [4] input @1 department_id 4.0 @5 department_name $char45. @50 department_head 4.0; . . .
FUNCT is assigned the value of OBTAIN so that the data for the owner record is returned to the DATA step program. | |
SEQ is assigned OWNER to generate an OBTAIN OWNER function call. | |
INSET specifies the set whose owner record is to be retrieved. | |
The INPUT statement generates and submits the OBTAIN OWNER function call. If successful, data returned to the buffer are mapped to the named variables. |
To generate the FIND|OBTAIN record WITHIN set|record USING sortfield function call, specify these options:
To generate the FIND|OBTAIN record WITHIN set|record CURRENT USING sortfield function call, include:
The following example shows an OBTAIN record WITHIN CURRENT set USING sortfield function call. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=funct record+recname errstat=stat sequence=seq set=inset sortfld=skey; . . . [1] funct = 'OBTAIN'; [2] seq = 'CURRENT'; [3] skey = 'GARFIELD' || 'JENNIFER'; [4] recname = 'EMPLOYEE'; [5] inset = 'EMP-NAME-NDX'; [6] input @1 employee_id 4.0 @5 firstname $char10. @15 lastname $char15. @30 street $char20. @50 city $char15. @65 state $char2. @67 zip $char9. @76 phone 10.0 @86 status $char2. @88 ssnumber $char9. @97 startdate 6.0 @103 termdate 6.0 @109 birthdate 6.0 @115 filler01 $char2. ; . . .
FUNCT is assigned the value of OBTAIN to retrieve the data for the employee record with the sort key of JENNIFER GARFIELD. | |
SEQ is set to CURRENT to indicate that the search begins with the current record of the set specified in INSET. | |
SKEY contains the value of the sort control element to be used in searching the sorted set. In this example, SKEY is set to the last and first name value of the employee name sort control element in the EMP-NAME-NDX set where you want to begin the search. | |
RECNAME is set to the name of the record to retrieve. In this example, you are looking for the EMPLOYEE record. | |
INSET is assigned the name of a sorted set. | |
The INPUT statement generates and submits the OBTAIN SORTFLD WITHIN CURRENT set function call. If successful, data are mapped from the buffer to the named variables. |
Follow these rules when selecting members within a set:
Follow these rules when selecting records within an area:
And one of these options:
And optionally:
The following example shows an OBTAIN PRIOR record WITHIN AREA function call. Currency has already been established on an EMPLOYEE record. The numbers in the program correspond to the numbered comments following the program.
infile empss01 idms func=funct area=subarea record=recname errstat=stat sequence=seq; . . . [1] funct = 'OBTAIN'; [2] seq = 'PRIOR'; [3] subarea = 'EMP-DEMO-REGION'; recname = 'EMPLOYEE' [4] input @1 employee_id 4.0 @5 firstname $char10. @15 lastname $char15. @30 street $char20. @50 city $char15. @65 state $char2. @67 zip $char9. @76 phone 10.0 @86 status $char2. @88 ssnumber $char9. @97 startdate 6.0 @103 termdate 6.0 @109 birthdate 6.0 @115 filler01 $char2. ; . . .
FUNCT is assigned the function of OBTAIN to retrieve the data for the EMPLOYEE record. | |
SEQ is set to PRIOR to indicate that the prior EMPLOYEE record is requested. | |
SUBAREA contains the name of the current area from which to retrieve the EMPLOYEE record. | |
The INPUT statement generates and submits the OBTAIN PRIOR function call. If successful, data are mapped from the buffer to the named variables. |
GET |
To generate the GET <record-name> function call, specify:
And optionally:
The following example shows the GET function call with no other options.
infile empss01 idms func=func1 record=rec1 errstat=err; . . . [1] func1 = 'GET'; [2] input @1 department_id 4.0 @5 department_name $char45. @50 department_head 4.0; . . .
FUNC1 is assigned the value of GET. | |
The record that is current of the run unit is moved into the input buffer. Currency must be established before issuing the GET function. |
The following example shows the GET function call for the DEPARTMENT record.
infile empss01 idms func=func1 record=rec1 errstat=err; . . . func1 = 'GET'; [1] rec1 = 'DEPARTMENT'; input @1 department_id 4.0 @5 department_name $char45. @50 department_head 4.0; . . .
The difference between this GET function call and the previous GET call is the use of the SAS variable REC1. This variable is set to the name of the specific record to move into the record buffer. In this example, the data associated with the DEPARTMENT record is moved. Currency must be established on the DEPARTMENT record before a GET call can be made for the record. |
IF |
There are two formats for the DML IF statement:
To issue the DML IF statement, specify these options:
The following is an example of a DML IF function call.
infile empss01 idms func=funct record=recname area=subarea errstat=stat sequence=seq set=inset; [1] funct = 'FIND'; seq = 'FIRST'; recname = 'DEPARTMENT'; subarea = 'ORG-DEMO-REGION'; input; if (stat ^= '0000') then go to staterr; [2] funct = 'IF'; [3] seq = 'NEMPTY'; [4] inset = 'DEPT-EMPLOYEE'; recname = ' '; subarea = ' '; input; [5] if (stat = '1601') then do; put @1 'Set ' @5 inset @14 'is not empty'; stat = '0000'; _error_ = 0; end; [6] else if (stat = '0000') then put @1 'Set' @5 inset @14 'is empty'; else go to staterr; stop;
Run-unit currency for the DML IF statement is established by the previous function call. Here, a FIND function call establishes run-unit currency on the record DEPARTMENT for the DML IF statement, but does not retrieve the record. | |
FUNCT is assigned the value of IF to indicate that a test will be performed. Set currency is determined by the owner of the current record in the set named in INSET. | |
SEQ is set to NEMPTY to indicate the type of test. | |
INSET names the set to test. | |
The first SAS IF statement directs the DATA step to write a message to the log if the value of STAT is 1601, which means that the set is not empty. | |
The second SAS IF statement directs the DATA step to stop if the value of STAT is 0000, which means the set is empty. |
RETURN |
There are two formats for the RETURN function:
To generate the RETURN CURRENCY <set> NEXT |PRIOR|FIRST|LAST INTO DBKEY key INTO SORTKEY skey function call, specify these options:
The following example shows the RETURN FIRST function call.
infile empss01 idms func=func1 errstat=err sequence=seq set=inset sortkey=skey dbkey=dkey; . . [1] func1 = 'RETURN'; [2] seq = 'FIRST'; [3] inset = 'EMP-NAME-NDX'; input; [4] put @1 'DBKEY OF RECORD = ' @19 dkey; put @1 'SKEY OF RECORD = ' @19 skey; . . .
FUNC1 is assigned the function of RETURN. | |
SEQ is assigned the value of FIRST. FIRST returns the db-key for the first index entry in the set EMP-NAME-NDX. You could also request the db-key from the PRIOR, FIRST, or LAST index entry in the set by assigning these values to the SEQUENCE= option. | |
SET is assigned the name of the index set (INSET) from which the specified db-key is to be returned. | |
DKEY will contain the db-key for the first entry in EMP-NAME-NDX. SKEY will contain the symbolic key for the entry. The PUT statements print the db-key and the symbolic key on the SAS log. |
To generate the RETURN USING SORTKEY <set> INTO DBKEY key INTO SORTKEY skey function call, specify these options:
infile empss01 idms func=func1 record=recname ikeylen=keyl errstat=err sequence=seq set=inset dbkey=dkey sortkey=skey; . . . [1] func1 = 'RETURN'; [2] seq = 'USING'; [3] inset = 'EMP-NAME-NDX'; [4] skey = 'GARFIELD JENNIFER'; [5] keyl = 25; [6] dkey = ' '; input; . . .
FUNC1 is assigned the function of RETURN. | |
SEQ is set to USING to indicate that the index key entry in SKEY will be used to locate the db-key. In this example, SKEY is set to the last name and first name GARFIELD JENNIFER. The call will return the db-key and symbolic key of the first record it encounters which contains the name GARFIELD JENNIFER. | |
INSET is the name of the index set to be searched. | |
SKEY specifies the index key value to search for. | |
KEYL specifies the length of index key value. | |
DKEY is set to blanks to receive
the db-key.
After the RETURN function call has successfully executed, the db-key is returned to the DATA step in the DKEY variable. |
Summary of Options Needed to Generate CA-IDMS Function Calls |
Options Needed to Generate Function Calls for COBOL DML outlines the SAS INFILE parameters that are required to generate each of the CA-IDMS function calls for COBOL DML.
COBOL DML Call | INFILE Statement Options | ||||
---|---|---|---|---|---|
ACCEPT db-key FROM CURRENCY | FUNC | SEQUENCE | RECORD | SET | AREA |
ACCEPT | CURRENT | - | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
ACCEPT db-key FROM record-name CURRENCY | FUNC | SEQUENCE | RECORD | SET | AREA |
ACCEPT | CURRENT | Required | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
ACCEPT db-key FROM set-name CURRENCY | FUNC | SEQUENCE | RECORD | SET | AREA |
ACCEPT | CURRENT | - | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
ACCEPT db-key FROM area-name CURRENCY | FUNC | SEQUENCE | RECORD | SET | AREA |
ACCEPT | CURRENT | - | - | Required | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
ACCEPT db-key FROM set-name NEXT|PRIOR|OWNER CURRENCY | FUNC | SEQUENCE | RECORD | SET | AREA |
ACCEPT | NEXT PRIOR OWNER | - | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
BIND record-name | FUNC | SEQUENCE | RECORD | SET | AREA |
- | BIND | - | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN CALC* record-name | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | - | Required | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | Required | Required | ||
FIND/OBTAIN DUPLICATE* record-name | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | DUP | Required | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | Required | Required | ||
FIND/OBTAIN CURRENT | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | CURRENT | - | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN CURRENT record-name | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | CURRENT | Required | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN CURRENT|NEXT|PRIOR|FIRST|LAST|Nth WITHIN set-name | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | NEXT PRIOR FIRST LAST Nth | Optional | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN CURRENT|NEXT|PRIOR|FIRST|LAST|Nth WITHIN area-name | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | NEXT PRIOR FIRST LAST Nth | Optional | - | Required | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN OWNER WITHIN set-name | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | OWNER | - | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN record-name WITHIN set-name USING sort-key | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | - | Required | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN record-name WITHIN set-name CURRENT USING sort-key | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | CURRENT | Required | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
FIND/OBTAIN DBKEY db-key | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | - | - | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
FIND/OBTAINrecord-name DB-KEY IS db-key | FUNC | SEQUENCE | RECORD | SET | AREA |
FIND OBTAIN | - | Required | - | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | - | - | - | ||
GET record-name | FUNC | SEQUENCE | RECORD | SET | AREA |
- | GET | - | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
- | - | - | - | ||
RETURN db-key FROM index-set-name CURRENT|FIRST|LAST|NEXT| PRIOR KEY INTO symbolic-key | FUNC | SEQUENCE | RECORD | SET | AREA |
RETURN | CURRENT FIRST LAST NEXT PRIOR | - | Required | - | |
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | Required | - | - | ||
RETURN db-key FROM index-set-name USING index-key-value KEY INTO symbolic-key | FUNC | SEQUENCE | RECORD | SET | AREA |
RETURN | USING | - | Required | ||
DBKEY | SORTFLD | IKEY | IKEYLEN | ||
Required | Required | - | - | ||
* KEYOFF= INFILE statement option required for these calls |
How the CA-IDMS Function Call Is Generated |
If the access method cannot generate a function call from the options that you entered or if the options for a particular function call are incorrect, an error message is returned, the automatic variable _ERROR_ is set to 1, and the CA-IDMS call status is set to 9999. Your DATA step program should check for these conditions after each function call to the database.
Using Multiple Sources of Input |
If after you change input sources by executing multiple INFILE statements you want to return to an earlier input source, it is not necessary to repeat all options specified in the original INFILE statement. The SAS System remembers options from the first INFILE statement with the same fileref or subschema name. In a standard INFILE statement, you need only specify the fileref. In a CA-IDMS INFILE statement, specify the subschema and IDMS. Options specified in a previous INFILE statement with the same fileref or subschema name cannot be altered.
Note: The subschema name cannot be the same name as a fileref on a JCL DD statement,
a TSO ALLOC statement, or a filename's fileref for the current execution of
the SAS System.
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Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.