Wildcards in the element identifier

Since the EL level of an address itself can comprise several parts, the following extension applies here: An "*" addresses all the elements of this and all lower levels. An asterisk followed by a period ("*.") addresses exactly one level. The depth of the levels is determined by the periods ("."). To skip levels, use a period and asterisks , e.g. (".**"). This applies provided that the levels are within the element hierarchy. Therefore, specify at least one asterisk "*" for the DP level or include a period before the first "**".


Figure 1. Typical Data points Structure

The naming convention of WinCC OA stipulates that elements of an array (that is, the structure of a particular type) are numbered from 1 to n. Other names are not taken into account since these elements are always named "array[index]" by the system. This also influences the resolution of the wildcards and prevents the correct detection of the elements if the naming conventions are not adhered to.

Table: Expression and Results for the above-mentioned Example

Expression Result(s)
DP1.A.M.* DP1.A.M.1, DP1.A.M.2
DP1.*.1 DP1.A.1, DP1.B.1
DP1.*1 DP1.1
DP1.**1 DP1.A.M.1, DP1.A.1, DP1.B.1, DP1.1, DP1.1.OTTO1
DP1.**.1 DP1.A.M.1, DP1.A.1, DP1.B.1, DP1.1
DP1.{A,B}.* DP1.A.M, DP1.A.1, DP1.B.1, DP1.B.2
DP1.*.*.1 DP1.A.M.1
DP1.* DP1.A, DP1.B, DP1.1
DP1.** DP1., DP1.A, DP1.A.M, DP1.A.M.1, DP1.A.M.2, DP1.A.1, DP1.B, DP1.B.1, DP1.B.2, DP1.1, DP1.1.OTTO1
DP1.: DP1.