Naming Conventions

The purpose of the naming conventions is to use prefix letters to classify model variables. These conventions allow the variable type to be easily known and rapidly identified. The naming conventions are summarised in the Table below:

Type / Status	integer	real	logical	character	structure	double precision	complex
public or module variable	m n but not nn_ np_	a b e f g h o q r t to x but not fs rn_	l but not lp ld ll ln_	c but not cp cd cl cn_	s but not sd sd sl sn_	d but not dp dd dl dn_	y but not yp yd yl yn
dummy argument	k but not kf	p but not pp pf	ld	cd	sd	dd	yd
local variable	i	z	ll	cl	sl	dl	yl
loop control	j but not jp
parameter	jp np_	pp	lp	cp	sp	dp	yp
namelist	nn_	rn_	ln_	cn_	sn_	dn_	yn_
CPP macro	kf	fs

N.B. Parameter here, in not only parameter in the FORTRAN acceptation, it is also used for code variables that are read in namelist and should never been modified during a simulation. It is the case, for example, for the size of a domain (jpi,jpj,jpk).