|
|
|
| 1 |
The Free Software Definition |
gnu.org |
6/12/2008 |
|
461 |
|
We maintain this free software definition to show clearly what must be true about a particular software program for it to be considered free software. "Free software" is a matter of liberty, not price. To understand the concept, |
|
|
|
| |
Data Structures and Algorithms |
|
|
|
| 1 |
Modeling Hierarchies |
Tom Haughey |
9/26/2008 |
|
429 |
|
This article talks about the basic concepts of recursion in a logical model, and will discuss several practical physical implementations, namely, DBMS, descendent tables, snowflaked hierarchies, flattened hierarchies, self-joins, and nested sets. |
|
|
|
|
|