Via <para> a text paragraph inside <text> is put into brackets. Starting with version 2.2.0 of UDDF it is always necessary to use <para> when inserting text — even if only one paragraph is needed.
<text>
<text>
(see also <notes>)
<notes>
<image id="picture_1">
<!-- here data of the image -->
</image>
<text>
<para>
This is a first paragraph.
</para>
<para>
This is the second paragraph.
</para>
<imageref ref="picture_1"/>
<para>
And this is the third paragraph. Before it via an <imageref> element
a photo is inserted into the text.
</para>
</text>
</notes>