<font size=2 face="sans-serif">Dear WG Colleagues,</font>
<br><font size=2 face="sans-serif">Reviewing the XFDU schema I have no
major comments, in general it looks OK to me. It has an own namespace,
which believe is in line with the current namespace policy.</font>
<br>
<br><font size=2 face="sans-serif">More detailed, I have the following
observations / comments:</font>
<br>
<br><font size=2 face="sans-serif">HD-1: The reference to the file itself
is just a string: </font><font size=2 color=#008080 face="Monaco"><</font><font size=2 color=#3f8080 face="Monaco">xsd:attribute</font><font size=2 face="Monaco">
</font><font size=2 color=#800080 face="Monaco">name</font><font size=2 face="Monaco">=</font><font size=2 color=#4200ff face="Monaco"><i>"href"</i></font><font size=2 face="Monaco">
</font><font size=2 color=#800080 face="Monaco">type</font><font size=2 face="Monaco">=</font><font size=2 color=#4200ff face="Monaco"><i>"xsd:string"</i></font><font size=2 color=#008080 face="Monaco">/></font>
<br><font size=2 face="sans-serif">I do not know if the use of xlink has
been considered, in my mind it is the standard XML way of linking files:
</font><a href=https://en.wikipedia.org/wiki/XLink><font size=2 color=blue face="sans-serif">https://en.wikipedia.org/wiki/XLink</font></a>
<br>
<br><font size=2 face="sans-serif">HD-2: The mime types are defined as
a string, basically everything is allowed here from a schema point of view.
Especially for cross support I wonder if it has been considered to enumerate
the supported mime types? See here:</font>
<br><font size=2 color=#008080 face="Monaco"><</font><font size=2 color=#3f8080 face="Monaco">xsd:simpleType</font><font size=2 face="Monaco">
</font><font size=2 color=#800080 face="Monaco">name</font><font size=2 face="Monaco">=</font><font size=2 color=#4200ff face="Monaco"><i>"mimeTypeType"</i></font><font size=2 color=#008080 face="Monaco">></font>
<br><font size=2 face="Monaco">
</font><font size=2 color=#008080 face="Monaco"><</font><font size=2 color=#3f8080 face="Monaco">xsd:restriction</font><font size=2 face="Monaco">
</font><font size=2 color=#800080 face="Monaco">base</font><font size=2 face="Monaco">=</font><font size=2 color=#4200ff face="Monaco"><i>"xsd:string"</i></font><font size=2 color=#008080 face="Monaco">/></font>
<br><font size=2 color=#008080 face="Monaco"></</font><font size=2 color=#3f8080 face="Monaco">xsd:simpleType</font><font size=2 color=#008080 face="Monaco">></font>
<br>
<br><font size=2 face="sans-serif">Best regards,</font>
<br><font size=2 face="sans-serif">Holger</font>
<br>
<br><font size=2 face="sans-serif">Holger Dreihahn<br>
European Spacecraft Operations Centre | European Space Agency | S-431<br>
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