Can you please clarify the following point from your terms of service?
If you syndicate, publish or otherwise transmit any content containing, enhanced by or derived from Calais-generated metadata you will use your best efforts to incorporate the correct Calais-provided Globally Unique Identifier (GUID) in that content. You specifically agree not to attach incorrect GUIDs to your content with any intent to mislead, spam, spoof, phish or otherwise deceive downstream consumers of your content.
I have a news website. I would like to use Calais metadata to display related news articles and content from my site. I am not displaying the metadata directly, but saving them in database for full text matching. Does the above term mean that I should add the GUID in my news article pages at a visible / invisible location?

Joyce,
You do not have to display the GUIDs on your website - that would be pretty unpleasant for your readers. What we’d like to have happen is that large content syndicators who enhance their content with OpenCalais incorporate the QUID in content they syndicate. This doesn’t apply in the case of your average blog and there is no requirement to display the GUID.
Regards,
Thanks again, FranSan.