CAP errata 2 items

Hi,
	Pulling from the CAP 1.2 comment summary document these are what could be part of the 2nd errata,

Core Items

3 - Caution/restriction against restricted, escaped, and special characters and encoded entities in content fields
15,17-6,20,22 - New responseType values of Avoid and AllClear
16,19 - Editorial changes
27 - Clarification on acceptable values in polygon and circle elements
28 - Expand CAP examples to include update and bilingual messages

Optional

17-2 - Data dictionary change restricting Null values for required elements
17-4 - Modify the format of incidents element to allow optional transport/location values
17-5,17-7 - Element length restrictions or "should" cautions for event and instruction elements

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