#### Description:

This attribute is a boolean value which indicates if the `"` -TAB`"` algorithm, defined in FITS-WCS paper III, should be used if at all possible when writing out a FrameSet using the FITS-WCS encoding.

Note this attribute has no effect unless the TabOK attribute is set to a positive non-zero value. If, in addition to setting TabOK, ForceTab is set to non-zero value, astWrite will attempt to use the

- TAB algorithm even if another algorithm could have been used. If ForceTab is left at its default value of zero, then the -TAB algorithm will be used only if no other algorithm can be used.

Type:

  Integer (boolean).

#### Applicability

##### FitsChan

All FitsChans have this attribute.
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