Actually the principle is in applied thought in Practice.
If you apply the same attributes of one martial art into another that art is no longer constrained to its earlier limitations.
Now. White Tiger is an Internal Art. Is has existed in its current form for 380 Years. IT is the most complete system of Martial arts that I have ever encountered.
Many outsiders will attempt to label it, yet that label will remain inaccurate.
That is unfortunate ...yet it will not change. People feel they need to catagorize elements for their own comfort.
TRUE systems have external AND internal. By true I mean complete Shaolin systems.
18 hand forms
18 two man forms
45 weapon forms
100 various mediations (Standing, sitting, lying, hidden combination breath 2 man an so on)
Iron Palm, (Shattering, springing, Fireyand burning)
Iron Jaket
Point Striking
and most important The knowledge to heal.
This is what a system of kung-fu is based on.
That is what WT is based on.
Karate is Primarily an extenal art
Tai chi is primarily an internal Art
White Tiger by definition of the Family Grandmaster is Internal.
It is a system.