11. A system, comprising: an interface to receive a search query; and a processing unit to: execute a search using the search query to identify a set of documents, identify anchor text, in a plurality of documents, that matches the search query, each of the anchor text being associated with a link, determine whether a majority of the links point to a particular document in the set of documents, assign a first quantity of points to the particular document when a majority of the links point to the particular document, where the first quantity of points does not equal zero and where a quantity of the assigned points is restricted over a given period of time, assign a second quantity of points to the particular document when there is not a majority of the links that point to the particular document, where the second quantity of points is equal to zero, and use the assigned points as a measure of quality for the particular document in subsequent searches.
11. A system, comprising: an interface to receive a search query; and a processing unit to: execute a search using the search query to identify a set of documents, identify anchor text, in a plurality of documents, that matches the search query, each of the anchor text being associated with a link, determine whether a majority of the links point to a particular document in the set of documents, assign a first quantity of points to the particular document when a majority of the links point to the particular document, where the first quantity of points does not equal zero and where a quantity of the assigned points is restricted over a given period of time, assign a second quantity of points to the particular document when there is not a majority of the links that point to the particular document, where the second quantity of points is equal to zero, and use the assigned points as a measure of quality for the particular document in subsequent searches. 13. The system of claim 11 , where the quantity of the assigned points is limited for each of a plurality of users or each of a plurality of network addresses.