/** md
Title: Running a Strategy, continued

## Disjunctive Normal Form

The next Stratego example, in {! ../docrefs/sec4.2.md !}, extends
`prop-eval-rules` to convert SPL propositions into disjunctive normal form (DNF).
Once again, we can place the Stratego code in `trans/prop-dnf-rules.str`:

```Stratego
**/
/** md Include this code in documentation: */
module prop-dnf-rules
imports prop-eval-rules
rules
  E : Impl(x, y) -> Or(Not(x), y)
  E : Eq(x, y)   -> And(Impl(x, y), Impl(y, x))

  E : Not(Not(x)) -> x

  E : Not(And(x, y)) -> Or(Not(x), Not(y))
  E : Not(Or(x, y))  -> And(Not(x), Not(y))

  E : And(Or(x, y), z) -> Or(And(x, z), And(y, z))
  E : And(z, Or(x, y)) -> Or(And(z, x), And(z, y))
/* end of code inclusion **/
/** md rest of documentation
```
and create a `trans/prop-dnf.str` that defines a strategy for applying the
DNF rules and supplies the glue needed between ESV and Stratego:
```Stratego
{! prop-dnf.str !}
```
Now just importing `prop-dnf` in `trans/spoofax-propositional-language.str`
and adding a menu item to `editor/Manual.esv`:
```ESV
 ...
{! ../editor/Manual.esv extract: {start: menus} !}
```
should suffice to make the dnf strategy available in the "Spoofax > Manual"
menu.

Indeed, we can try it out on `syntax/examples/sec4.2_test3.spl`:
```SPL
{! ../syntax/examples/sec4.2_test3.spl !}
```
to produce
```
{! ../syntax/examples/sec4.2_test3.dnf.aterm !}
```
as verified in the manual (again, modulo the"ATom" typo in the manual).

However, we also want to use this second example to show another method of
running Stratego strategies from the Eclipse IDE.

## Spoofax Testing Language

CONTINUE FROM HERE
**/