Event Modeling Exercise

  • Due No Due Date
  • Points 13
  • Submitting a file upload
  • Available after Feb 22, 2021 at 12am

Use the information in the Lesson Slidedoc and the KRL documentation to complete the following exercises.

Assume the following event streams:

  1. Twitter stream (tweet:received) with attributes body and from
  2. Email IMAP account (email:received, email:sent, email:forwarded) with attributes, to, from, subj, and body
  3. Stock price update stream (stock:update) with attributes ticker, price, change, percent, and name
  4. Web pageview (web:pageview) with attributes url, title, and referer.

Write event expressions that select the following:

  1. Tweets containing the keyword "healthcare"
  2. Emails received with a subject containing the words "BYU" and "football" in any order
  3. Four tweets with the keyword "healthcare" within 4 hours
  4. Tweet with keyword "healthcare" followed by an email with "healthcare" in the body or subject
  5. More than five emails from the same person within a 20-minute period
  6. Tweets that contain a stock-ticker symbol and the price of that same stock goes up by more than 2 percent within 10 minutes
  7. User visits any two of Google, Yahoo!, MSNBC, CNN, or KSL.
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