SolidMesh generates a TAGS file whenever a surface grid is written.  A TAGS file contains a list of boundary surface properties for each Group including: ID, name, boundary condition, initial normal spacing, and boundary-layer thickness.  An example TAGS file is listed below:

#							Trans	Initial	BL
#ID	Group	Visc	Recon	Rebuild	Source	Trans	Delete	Spacing	Thickness
1	Wall	1	1	0	0	0	0	1.0e-6	1.0e-2
2	Symmetry	0	0	1	0	0	0	0	0
3	Control	0	0	0	0	0	1	0	0
4	FarField	0	1	0	0	0	0	0	0

The values for the boundary conditions Visc, Recon, Rebuild, Source, Trans, and Trans-Delete are binary and should either be set to 1 or 0.  If the value is 1 then that corresponding boundary conditions is set.  A value of 0 means that boundary conditions is not set.  The command line option -tags is used to enforce the properties specified in the TAGS file in order to reset the corresponding ones specified in the input surface grid file. 

The format for a TAGS file is: .

ID	Boundary surface ID flag for group (must be unique)
Group	Group label with up to 32 ASCII characters.  Spaces should not be embedded within the label.
Visc	Not applicable with Rebuild or Source
Recon	Not applicable with Source or Trans-Delete.
Rebuild	Not applicable with Visc or Trans-Delete.
Source	Not applicable with Visc, Rebuild, or Trans-Delete.
Trans	Not applicable with Source or Trans-Delete.
Trans-Delete	Not applicable with Trans or Trans-Delete.
Initial Spacing	Initial boundary-layer normal spacing (if Visc is 1) for the group.  SolidMesh smoothes values set in a TAGS file if they differ between groups.
BL Thickness	Boundary-layer thickness (if Visc is 1) for the group.  SolidMesh smoothes values set in a TAGS file if they differ between groups.

If incompatible boundary conditions are specified, the precedence is applied right to left.  For example, if both Visc and Trans are specified in the TAGS file, then Trans will be applied.