Compare web pages and report differences(repost)

We store large amounts of data that is downloaded or scraped from webpages. We need a web-based report for our support staff to identify when we are missing latest updates by comparing our datasets with the original sources on the web. **This is first of several support-related projects. Winning bidder will have additional projects if this one is completed satisfactorily. ** Specifc page details will be provided to winning bidder. For security reasons, we cannot post the details here. ## Deliverables * There are about 12 comparisons that need to be made between our database and source documents. * Project should be a scheduled task that makes comparisons every few minutes and stores results in database. * Report view should show current status of each comparison, with link to review history of comparisons. * If mismatch is detected, email alert should be sent to designated address. * Most formats will be either HTML or XML. Should be able to parse and compare values using RegEx or similar. In most cases, comparisons can be made on unique id's and/or datetime stamps. * Prefer ASP.NET, C#, SQL Server environment