Distributed-client change-detection tool with change-detection augmented by multiple clients
US5978842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jul 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99952
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A distributed-client change-detection tool detects changes in Internet web-page documents on the world-wide-web. To register a web page for change detection with a change-detection server, a user specifies the web page's URL. A client-side change-detection application is downloaded to the user's client from the change-detection server. The server assigns a date and time for the client to perform change detection. At the assigned time and date, the client fetches a new copy of the web page and compares it to an archived copy to detect changes. When the client detects a change, it sends a notification with the URL to the server. The server verifies that the change has not already been reported by another user's client and then notifies all users of the registered web page. As more users are registered for a web page, change detection is performed more frequently. The most popular pages with tens of thousands of registered users are checked every few minutes. Each user is notified within minutes of any changes in the registered web page, even though any one user only performs change-detection once a month. Checksums rather than entire web pages can be stored and compared to reduce sto…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.