Group Related Options
- Last UpdatedNov 27, 2025
- 2 minute read
MicroStation groups are also known as anonymous or orphan cells. They have a limited capacity. If a group reaches this limit, that group will be closed and a new group opened (a message will be written to the log-file, if any, each time this occurs). Any tags associated with the group will be associated with the first group created.
Note: The groups produced are never nested.
GroupSymb
The default for this switch is Off. If it is switched On, a single group is created for each instanced Draft symbol if no other group is active.
GroupFill
The default for this switch is Off. If it is switched On, a single group is created for each Draft hatch/fill pattern if no other group is active.
GroupFrame
The default for this switch is Off. If it is switched On, a single group is created for each Draft view frame if no other group is active. This option puts the line representing the frame itself, not the contents of the frame, into the group.
Group Rules
Standard selection syntax is used to define Group Rules. These specify how design elements are to be organized into MicroStation groups. If element attributes are included in group definitions, they will be attached to the groups as MicroStation tags. For example:
GROUP ALL STRU, INCLUDE NAME
GROUP ALL BRAN WITH ( HBOR GE 100 ) , INCLUDE NAME SPREF
Design elements which can have group rules include: SITE, ZONE, STRU, SUBS, FRMW, SBFR, EQUI, SUBE, PIPE, BRAN, HVAC, REST, GRDM, PTRA, BOUN, DRAWI (when owned by a SITE or ZONE) and all Piping Components.
Draft elements which can have group rules include: LAYE, NOTE, OLAY, VNOT, GLAB, SLAB, ADIM, LDIM, PDIM and RDIM.
Only the first Group rule that matches an element is ever considered. The order of the rules is therefore important.
Note: Elements may be both grouped and levelled. Group rules specify that one group will be created for each occurrence of an element that fits a given rule. Level rules specify that all elements, which fit a given rule, will be placed on the same level or range of levels.
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Example: |
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GROUP ALL GLAB |
places each GLAB in a separate group |
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LEVEL ALL GLAB, ‘ON 25’ |
places the group for each GLAB on Level 25 |