You'll find in the command parameters of the above toolBar, in some cases, element qualified names such as {http://www.xmlmind.com/ns/sect}table and in other cases, references to elements templates, such as #template({http://www.xmlmind.com/ns/sect}table,header).

The later notation means:

Note that element templates are uniquely identified by the combination element name/template name, and not by the template name alone.

Why specify element templates in your configuration file? By default, XXE creates the simplest possible, valid, element. For example, in the case of a table, this simplest possible, valid, table has just one tableRow, containing just one tableCell. In the case of a table, this is too simple to be really useful. On the contrary, we want a table to contain by default 2 rows, each row containing 2 cells. We also want to have a number of predefined table templates easily available, for example, a table having a header row. All this can be specified using the elementTemplate configuration element.

Excerpts from rng_section_config/common.incl (same file for all variants):

<elementTemplate name="rows2" selectable="override">
  <table xmlns="http://www.xmlmind.com/ns/sect">
    <tableRow>...ELIDED...</tableRow>
    <tableRow>...ELIDED...</tableRow>
  </table>
</elementTemplate>

<elementTemplate name="header">
  <table xmlns="http://www.xmlmind.com/ns/sect">
    <tableHeader>...ELIDED...</tableHeader>
    <tableRow>...ELIDED...</tableRow>
    <tableRow>...ELIDED...</tableRow>
  </table>
</elementTemplate>

<elementTemplate name="image" selectable="false">
  <paragraph xmlns="http://www.xmlmind.com/ns/sect"><image source="???"/></paragraph>
</elementTemplate>