It is also possible to nest
| Gloss |
|---|
| PreSpace | false |
|---|
| t | expressions |
|---|
|
, one inside the other. Any
validmay valid may be enclosed in a pair of brackets, and included as the value of an attribute in another
. For example, the
followingdescribes following describes a medication product that has a single dose form, which is both a spray and a suspension:
| Scg expression |
|---|
| Border | ridge |
|---|
| ShowFormat | block |
|---|
|
373873005 |Pharmaceutical / biologic product|:
411116001|Has dose form| = (421720008|Spray dose form| + 7946007 |Drug suspension|) |
In the example above, note the use of round brackets (i.e. "( )") to identify a nested
, as opposed to braces (i.e. "{ }"), which is used to identify attribute groups.
The following examples show how complexmay complex
| Gloss |
|---|
| PreSpace | false |
|---|
| t | expressions |
|---|
|
may be build up from simple ones, a layer at a time. This
firstdescribes first describes a left hip structure:
| Scg expression |
|---|
| Border | ridge |
|---|
| ShowFormat | block |
|---|
|
24136001|Hip joint structure|:
272741003|Laterality| = 7771000|Left| |
This next expression uses the "left hip"
above to describe a procedure to replace it:
| Scg expression |
|---|
| Border | ridge |
|---|
| ShowFormat | block |
|---|
|
397956004|Prosthetic arthroplasty of the hip|:
363704007|Procedure site| = (24136001|Hip joint structure|:
272741003|Laterality| = 7771000|Left|) |
Applying a further groupedto grouped
to the above describes a procedure to replace a left hip by inserting a prosthesis. Note that this example mixes an ungrouped qualification and a grouped qualification. Where this is done, the
| Gloss |
|---|
| t | canonical representation |
|---|
|
of of the expression includes all ungrouped attributes before the grouped ones (see
Terminology Services Guide for more details). Please also note that in the previous version of this standard a comma was not permitted between the last ungrouped attribute and the first attribute group – however this comma is now optional to avoid unexpected syntax errors.
| Scg expression |
|---|
| Border | ridge |
|---|
| ShowFormat | block |
|---|
|
397956004|Prosthetic arthroplasty of the hip|:
405814001|Procedure site - indirect| = (24136001|Hip joint structure|: 272741003|Laterality| = 7771000|Left|),
{ 363699004|Direct device| = 304120007|Total hip replacement prosthesis|,
260686004|Method| = 425362007|Surgical insertion - action|} |
Finally, the abovemay above
may be included within a contextual wrapper, to describe a procedure that has been performed on a patient to replace a left hip by inserting a prosthesis.
| Scg expression |
|---|
| Border | ridge |
|---|
| ShowFormat | block |
|---|
|
243796009|Situation with explicit context|:
{ 408730004|Procedure context| = 385658003|Done|,
408731000|Temporal context| = 410512000|Current or specified|,
408732007|Subject relationship context| = 410604004|Subject of record|,
363589002|Associated procedure| =
( 397956004|Prosthetic arthroplasty of the hip|:
405814001|Procedure site - indirect| = (24136001|Hip joint structure|:
272741003|Laterality| = 7771000|Left|)
{ 363699004|Direct device| = 304120007|Total hip replacement prosthesis|,
260686004|Method| = 425362007|Surgical insertion - action|} ) } |