Whitelist basic
read-only

Allow only basic text tags.

The following tags are allowed: a, b, blockquote, br, cite, code, em, dd, dl, dt, i, kbd, li, ol, p, pre, q, samp, small, span, strike, strong, sub, sup, u, ul and var.

blockquote and q allow the cite attribute if it contains a valid uri and its scheme is blank, http or https.

a allows the href attribute if it contains a valid uri and its scheme is blank, http or https.

In a the attribute rel="nofollow" will be added for href values that point to external pages. See Uris.external for more details.