Spec says "all" but sample and one table uses "All"
see Table 5-55: WatchURL
Table 5-39: NotificationFilter Element
|SignalTypes = "Notification"||...||Possible Signal/@Type values of the subscribed Messages.
all All – specifies that all Signals, regardless of @Type are queried/subscribed.
Values include those from: Message Message/@Type.
Note: the values are limited to Signal Messages.
Note: All (uppercase) was incorrectly defined as "all" (lowercase) in prior versions of the specification.
Propose modification to description
|NMTOKENS||Signal/@Type values of the subscribed messages. @SignalTypes SHOULD contain values as shown in Message/@Type, but are restricted to the values for Signal messages. In addition
All – specifies that all Signals, regardless of @Type are queried/subscribed.