Indicates that the content of the associated element will be coded in one of the named notations.
| Value | Meaning | 
|---|---|
| LaTeX | The content of the associated element will be in LaTeX. | 
| TEX | The content of the associated element will be in TeX. | 
| TeX | The content of the associated element will be in TeX. | 
| tex | The content of the associated element will be in TeX. |