Experimental Physics and
Industrial Control System

Rod Nussbaumer <[email protected]> · Thu, 05 Mar 2009 17:48:18 -0800

Dirk Zimoch wrote:

There was a mistake in my previous mail. You must specify the field in

the redirections (usually VAL).

    in "%*/Measure\(PPM\):/%f"
       "%*/Sample flow\(CC\):/%(\$1:FLOW.VAL)f"
       "%*/Scale:/%(\$1:SCALE.VAL)s"
       "%*/System status:/%(\$1:STATUS.VAL)s";

Dirk

Thanks for your help. I do now have a workable solution for this

application. It turns out that the application actually does not require

the use of regular expressions.

However, I am still confused about the syntax used to extract data

matching a regex, and especially where there are multiple components to

be extracted.

In the example protocol file, there is an entry like:

in "%.1/<TITLE>(.+)<\/TITLE>/";

As I understand it, the notation "%.1" says to use the data matched by

the first parenthesized component (ie the TITLE element data).

Logically, it follows that one could match a second parenthesized regex

component, and assign the matching data to a specified record field. Is

this true, and if so, what notation would be used?

An example of this, using HTML again, might be:

<FONT color="black" size="6">

One can devise a regex that matches the two quoted values of the

attributes, 'color' and 'size'; something like

/<FONT\s+color="(.+)"\s+size="(.+)">/

which contains two parenthesized parts of the regular expression, and

which I might like to assign to separate records. Can this be done, and

if so, what notation would be required?

Thanks.

   ---   rod.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System