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I understand that it is used as an indicator of what the page is from the domain. But my question is if the search robots "get score" on what is filled. Exemplos: text rev=”Vote-for” rev=”Vote-abstain” rev=”Vote-against” So I ask: The examples above, do they influence positively or negatively to the external page or page that is using these parameters? [In cases that the client uses this example above, filling the rev attribute to add event markers from GA.  May have some interference for robots or else for the positioning of the page in search results? If it not influence on the points mentioned, interference may be negative / positive at in some time?](http://www.site.com)

I add one sentence equal in every one of the 700 post (700 pages/urls). At the end of every article It's a signature in the text: "Content created by the group of portal XXX with informations of YYY." XXX = name of the site of the cliente and YYY = name of the site where the information has been used (source). In yyy will be puted a external link.

I would second Irving on this. We got hit with exactly the same issue. After a bit of head scratching our best bet was over-optimisation of anchor text. With a bit of work we managed to get a fair few of the anchor text changed, some removed and we also diluted the exact match anchor text ratio by linkbuilding with generic www.mysite.com type anchor text and the rankings returned after a few months.