NX Nastran DMAP Programmer's Guide - Kxcad.net

DBVIEW
DBVIEW
Creates virtual data block (or view) from one or more data blocks
Creates virtual data block (or view) from one or more data
blocks
Format:
DBVIEW view-name = data-block
Describers:
WHERE (where-expr)
(WHERE where-expr)
$
view-name Name of the view; 1 through 8 characters in length. The first character
must be alphabetic. The following characters can be used for
view-names: A through Z and 0 through 9.
data-block Name of a data block.
where-expr A logical expression that specifies the desired values of qualifiers,
PROJECT, PROJNO, VERSION, and DBSET. For example,
WHERE(VERSION=4 AND SEID< >2 AND SEID>0) selects all items
under version 4 for all values of SEID greater than 0 except 2. See
“WHERE and CONVERT Clauses” on page 45 and Remark 6.
Remarks:
1. DBVIEW is a nonexecutable statement defined only at compilation. It is not
affected by IF ( ) THEN or DO WHILE blocks. Where-expr, however, is evaluated
dynamically for the current values of data-block qualifiers at the module where
view-name is specified for input.
2. DBVIEW must be specified prior to the first occurrence of the use of the
view-name. It may only be specified as an input data block to a DMAP module.
3. If the data-block is “not generated” or if no data blocks satisfy the where-expr,
then the view-name will be considered as “not generated.” Also, if the
where-expr contains a qualifier that is not in the path of the data-block then the
view-name is not generated.
4. view-name is recognized only in the current subDMAP.
5. A view-name that results in more than one data block is also called a family. If a
family is specified as input to a module that does not use families, then the first
data block stored will be the one that is used.
6. The values assigned to qualifiers not specified in the where-expr are taken from
current values. “AND WILDCARD” may be specified in the where-expr to
indicate that unspecified qualifiers do not have to match their current values to
satisfy the DBVIEW statement.
7. A comma may be used in place of the spaces shown under Format to continue the
DBVIEW statement on more than one line. For example,
871