Hi, 
We have a dataset in two tables in MySQL.
We would like to find an easy example or tutorial on how to view what
is a hierarchical structure as a document using PHP and MySQL.

Table1 contains the hierarchy node details, table2 contains
relationships between items in table1

Table1
Entry_id
Notes

Table2
PrimaryKey
Up (contains a Table1.entry_id)
Down (contains a Table1.entry_id)

This is the data structure as represented by Table2:

             1                        2
       3   4     5                    6
     7  8      9   10
     

The numbers refer to entry_id's of notes in table1.  If we used the
positions instead it might read:
              Chairman
      President          CEO
vp-this   vp-that        etc...

We would like the data to display in document format from top to
bottom then up to the nearest juncture and so on, as depicted in the
following order:

1
3
7
8
4
5
9
10
2
6