Event Modeling Exercise

Use the information in the Lesson Slidedoc Links to an external site. and the KRL documentation Links to an external site. 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.