Abstract: A method of providing rating information in respect of Uniform Resource Identifiers to a client terminal. The method includes identifying a Uniform Resource Identifier at the client terminal, sending a first query to a rating server over an IP network, the query including as a query string a first component of the identified Uniform Resource Identifier or a derivative of that first component, and receiving the first query at the rating server and determining whether or not a rating exists for the query string. A response is sent by the server to the client terminal, the response including a determined rating, or an indication that no rating exists.

Abstract: A method of providing rating information in respect of Uniform Resource Identifiers to a client terminal. The method includes identifying a Uniform Resource Identifier at the client terminal, sending a first query to a rating server over an IP network, the query including as a query string a first component of the identified Uniform Resource Identifier or a derivative of that first component, and receiving the first query at the rating server and determining whether or not a rating exists for the query string. A response is sent by the server to the client terminal, the response including a determined rating, or an indication that no rating exists.

Abstract: A heat-insulating component consists of a porous body obtained by moulding and sintering an iron-base powder having an admixture of 2-10% by weight of silicon, preferably 4-8% by weight. A method of making the heat-insulating component includes the steps of preparing an iron-base powder mixture with an admixture of 2-10% by weight of silicon, preferably 4-8% by weight; optionally supplying the powder with further admixtures in the form of 3-12% by weight of maganese, preferably 5-10% by weight, up to 25% by weight of chromium, up to 15% by weight of nickel, up to 2.5 % by weight of molybdenum and up to 2% by weight of carbon, moulding the powder mixture into a body of desired shape, and sintering the body for obtaining a porous component having a coefficient of thermal conductivity below about 12 W/m.degree.K, preferably below 7 W/m.degree.K.