How long ClaimedIdentifier can be?

Hello,

I want to save ClaimedIdenti开发者_运维问答fier in database.

How long it can be?

Probably, 255 characters is ok?

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An openid.claimed_id is limited only by the maximum length of a URL, which technically can reach at least 2K -- I'm not sure just how large it can be.

However, even the unreasonably long OpenIDs actually seen in the wild don't exceed 255 characters, so that seems like a reasonable practical limit to me.