TAG INITIAL VALUE (BOZZA)
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Every [tag type] has its own default initial value:
* [Boolean]: false. * [Numeric]: 0. * [Variable
length string]: an empty string * [Fixed length
string]: a string of requested length filled with
spaces (or other pad character defined by the [tag
class]. * [Object]: null (an [object tag] cannot
have custom initial value). A custom initial value
of a tag can by provided by the [tag class] the
[tag] belongs to or by using the initialValue [tag
property].