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Norm Paulsen (norm.paulsen@ec.gc) Meteorological Service of Canada (Toronto)

CAP – Demonstration of Practice (Implementation Workshop – Geneva, Switzerland 9-10 December 2008). Norm Paulsen (norm.paulsen@ec.gc.ca) Meteorological Service of Canada (Toronto) - Information Strategy Section December 9 th , 2008. Alerting Scenario.

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Norm Paulsen (norm.paulsen@ec.gc) Meteorological Service of Canada (Toronto)

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  1. CAP – Demonstration of Practice(Implementation Workshop – Geneva, Switzerland 9-10 December 2008) Norm Paulsen (norm.paulsen@ec.gc.ca) Meteorological Service of Canada (Toronto) - Information Strategy Section December 9th, 2008

  2. Alerting Scenario • Imagine an event that is extremely critical (Tornado) • Imagine a message Originator having difficulty keeping up with the unfolding situation (Tornado outbreak) • Imagine the overall threat zone expanding in size (outbreak expanding to new areas) • Imagine the initial CAP file has already been transmitted some time ago • Let’s pick up the activity in progress….

  3. 6 p.m. local time (tornado outbreak)- <info>: Area 1 threat polygon (in this case it includes the area of concern over the <expires> time Sample

  4. 7 p.m. local time (numerous tornadoes reported)- <info>: new Area 2 threat polygon (again it includes the area of concern over the <expires> time Status

  5. 7 p.m. local time (what does the CAP file contain?)- <msgType>Update (summarize the whole event) ..or..- <msgType> Alert (focus on new threat area) AlertBlock?

  6. Message Originator… • May not want to bother with updating previous threat zone information when under pressure to issue information on the new threat zone • May have additional time constraints such as translation times and coordination issues with other jurisdictions • Real life might suggest <msgType>Alert be optional (or even standard) in this Scenario • No Area 1 referenced in the 7 p.m. CAP message

  7. Perspective? • If CAP is to be processed as designed (using XML philosophy and proper data theory principles) then… • <msgtype>alert should work fine for the 7 p.m. message • 6 p.m. message is still applicable • Taking a closer look at <msgType>update • <msgType> is an element of the <alert> block and Update implies that the information in all the containing <info> blocks is to supersede any previously <referenced> CAP file • In this case the <info> block details from the first CAP file at 6 p.m. would be replaced by information included in the new CAP file at 7 p.m. • So what does the <info> block for Area 1 contain?

  8. <msgType>Update • Is the 7 p.m. <info> block for area 1 auto-updated with new times for • <effective>, <onset>, <expires>, etc… • or are they left as is? • Issuer may not be comfortable with the results of auto-updated time information on the previous threat zone as it could impact the integrity of <description>, <headline>, etc… • However, if the <info> block is just repeated (all elements including time references), the presentation of the information should appear unchanged to the end client • Real life might suggest <msgType>Update include a total repeat of the earlier <info> block • Area 1 information in the 7 p.m. CAP message repeated and displays unchanged

  9. Originator Concerns with <msgType>=Update? • Is <urgency>, <severity> and <certainty> ok as they are? • Is the <description> element still relevant? • Are <effective>, <onset>, and <expires> times automatically updated or remain as they were? • Does the distributor display an “Updated at X:XX time” • Do they use <sent> or <effective>? • Can they handle <effective> and <onset> be in the past? • If <expires> occurs around the same time as the Update does the <info> block just disappear?

  10. Originator concerns with <msgType>=Alert? • Can a distributor accommodate multiple <info> blocks from different CAP files from different times • The <references> and <incidents> elements in CAP suggests they are expected to do so • Can two CAP message files combine and update into one file in a subsequent issue? • The <references> element in a CAP file suggests it can

  11. Conclusions • Originators may… • make use of <msgType>Alert in an threat zone expanding scenario • repeat an <info> block in <msgType>Update and not update any time references or <description> elements • Off topic but… • use <msgtype>Alert to solve “upgrading” and “downgrading” scenarios • keep all areas in separate messages (not advised) in order to use the <msgType>Cancel in a similar fashion

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