the block's current version (selects the point encoding for lines)
the unread tail of the block, preserved for round-tripping
how many times the page has been loaded
how many times the page has been merged
the block's minimum reader version
the header byte between the block length and the versions
Zero in every well-formed file seen, but preserved rather than assumed.
the number of text characters on the page
the number of text lines on the page
the block-type discriminant
Optionaltypethe type-folio use count, if the block carried one
the
0x0apage info block