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Two or moremay more

Gloss
Spacetrue
tconcepts
may be combined to form a new by new
Gloss
tconcept
 by joining them with the "+" symbol. This is particularly useful where both concepts are primitive. The resultantis theof each of thein the. The resultant below resultant
Gloss
Spacetrue
texpression
is the
Gloss
Spacetrue
tchild
of each of the
Gloss
Spacetrue
tconcepts
in the
Gloss
texpression
. The resultant
Gloss
texpression
 below represents a drug dose form that is both a spray and a suspension.

Scg expression
Borderridge
ShowFormatblock
   421720008|Spray dose form| + 7946007|Drug suspension|

Although not stipulated by the syntax, the twojoined two

Gloss
Spacetrue
tconcepts
joined in this way must (in nearly every case) come from the same top level
Gloss
thierarchy
. A rare exception to this rule is those expressions which refer to products that are both drugs and devices, and are therefore descendants of both 373873005 |pharmaceutical / biologic product| and 260787004 |physical object|.

The syntax does not mandate whichin theshould which

Gloss
Spacetrue
tconcepts
in the
Gloss
Spacetrue
texpression
should have associated terms and which should not, so it is valid (although not advisable) to mix and match. For example, the following syntax is valid: scg-expression
Concept
Borderridge
ShowFormatblock
421720008 +
t 421720008 + 7946007|Drug
suspension|
ShowFormatinline
The syntax allows spaces, tabs and carriage returns in most places. The following example has an identical meaning to the one above: scg-expression
Concept
Borderridge
ShowFormatblock
421720008 + 7946007 |Drug
t 421720008 + 7946007 |Drug suspension|
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