1. A method of controlling transfer of data between a first network of computers and a second network of computers, the method comprising the steps of: (a) parsing content description language received from the first network of computers by the second network of computers to determine current tag information within the content description language; and (b) dynamically making a completion decision by the second network of computers as to whether to allow the transfer of data based on the current tag information, wherein the completion decision is based upon a resource constraint of the second network of computers.
1. A method of controlling transfer of data between a first network of computers and a second network of computers, the method comprising the steps of: (a) parsing content description language received from the first network of computers by the second network of computers to determine current tag information within the content description language; and (b) dynamically making a completion decision by the second network of computers as to whether to allow the transfer of data based on the current tag information, wherein the completion decision is based upon a resource constraint of the second network of computers. 6. The method of claim 1 wherein the current tag information of step (a) includes a pricetag for the transfer of data, and wherein the completion decision of the step (b) is based upon the pricetag for the transfer of data.