# Database command

This command is used to define spatial dimension of model and number of degrees-of-freedom at nodes. Once issued additional commands are added to interpreter.

```tcl model BasicBuilder -ndm $ndm <-ndf $ndf> ```

ndm

spatial dimension of problem (1,2, or 3)

ndf

number of degrees of freedom at node (optional)

default value depends on value of ndm:

ndm=1 -> ndf=1

ndm=2 -> ndf=3

ndm=3 -> ndf=6