Events and properties - what are the limitations / constraints
The total size of event name, property key and value should not exceed 300 bytes (per property). Strings are UTF-8 encoded. Properties that exceed this limit will be ignored.
Properties: Key-value pairs with custom properties for the event.
Property keys may not contain the dot ('.') or dollar ('$') signs - they will be trimmed.
Properties must be:
NSNumbers, NSStrings, NSDates, NSURL, or NSNull. Keys must be NSStrings.
Integer, Double, Float, String, Url, Boolean, or Date.
Each session can have up to 200 data points (an event or its property), so an event with 3 properties is considered as 4 data points.
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