For a number of different transform types, you can specify the limits at which any match is valid for a text string. In the diagram below, you can see how six different positional identifiers can be applied to pattern matching:
NOTE: Depending on the type of transform, some of these clauses are not available. |
Pattern Clause Positioning |
Position Parameter | Description | Example | |
---|---|---|---|
after | Identifies pattern or string after which the match is evaluated. |
Extracts: | |
from | Identifies pattern or string from which the match is evaluated. Any match includes the from clause pattern or string. |
Extracts: | |
before | Identifies pattern or string before which the match is evaluated. |
Extracts: | |
to | Identifies pattern or string up to which the match is evaluated. Any match includes the to clause pattern or string. |
Extracts: | |
on | Identifies pattern or string in which the match may be found. |
Extracts: | |
at | Identifies the index of starting (x) and ending (y) characters in the string to match. In the above example, at:2,6 matches the string like . |
Extracts:
|
The following table identifies the pattern parameters that can be matched with the parameter in the left column.
NOTE: The |
Parameter | after | from | before | to | on |
---|---|---|---|---|---|
after | See Note 1. | No. | before or to | before or to | Yes. Can include before . |
from | No. | See Note 1. | before or to | before or to | No. |
before | after or from | after or from | See Note 1. | No. | Yes. Can include after . |
to | after or from | after or from | No. | See Note 1. | No. |
on | Yes. Can include before . | No. | Yes. Can include after . | No. |