In estate records children are listed. From this I surmise the fact that they were born (alternatively I could have just sourced their names with no facts). No place nor date information, only a source.
Herman is 100% correct. Here is the quote from the GEDCOM Standard:
All GEDCOM lines have either a value or a pointer unless the line contains subordinate GEDCOM lines. In other words the presence of a level number and a tag alone should not be used to assert data (i.e. 1 DEAT Y should be used to imply a death known to have happened but date and place are unknown, not 1 DEAT ).