For some reason we never knew about instance initializer in java; on the other hand static initializer is well known.

class A
{
  int x;
  static int y;

  // This is an instance initializer.
  {
    x = 1;
  }

  // This is a static initializer.
  static
  {
    y = 2;
  }
}

Worse, we have missed it in the java grammar when we were building jxom. This way jxom was missing the feature.

Today we fix the miss and introduce a schema element:

<class-initializer static="boolean">
  <block>
    ...
  </block>
</class-initializer>

It superseeds:

<static>
  <block>
    ...
  </block>
</static>

 that supported static initializers alone.

Please update languages-xom xslt stylesheets.

P.S. Out of curiosity, did you ever see any use of instance initializers?