[Developers] codes in topic name in topic.tsv?

[AJ Chen]

there are lots of codes like <C2><C3> in topic names in the topic.tsv file.
what are they? code for special chars?
thanks,
-- 
AJ Chen, PhD
Co-Chair, Semantic Web SIG, sdforum.org
Technical Architect, healthline.com
http://web2express.org
Palo Alto, CA
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