independently of the contents or the type of the object: all objects can
be validated by verifying that (a) their hashes match the content of the
file and (b) the object successfully inflates to a stream of bytes that
-forms a sequence of <ascii type without space>
+ <space> + <ascii decimal
-size> + <byte\0> + <binary object data>.
+forms a sequence of <ascii type without space>
{plus} <space> {plus} <ascii decimal
+size> {plus} <byte\0> {plus} <binary object data>.
The structured objects can further have their structure and
connectivity to other objects verified. This is generally done with