XML editor for QNX 4.25 & Photon

Hello,
I wonder if there is some XML editor for QNX 4.25 and Photon.
I need at least Explorer-like tree navigation. DTD validation and other
features would be great.

Thanks for any info,

Jiri Basek
Aveco s.r.o.
Veleslavinska 39
162 00 Praha 6
Czech Republic
tel. : +420 2 3536 6707
GSM : +420 603 24 58 24
email : Jiri.Basek@aveco.com