Usually an initiator acts as an identifier for the data. In your case, it sounds as if you simply want to skip over some leading/trailing data.

Possible solutions:
- define hidden elements of the required lengths. You will need to put each element into a global group and refer to the group via a hiddenGroupRef annotation. That may sound awkward, but it ensures that the parsed infoset can be validated against the xsd.
- if the initiators and terminators have a known length in bytes then you could use ( misuse? ) leadingSkip and trailingSkip to ignore them.

regards,

Tim Kimber, DFDL Team,
Hursley, UK
Internet: kimbert@uk.ibm.com
Tel. 01962-816742
Internal tel. 37246742

From: Miguel Vieira <carlos.vieira@gmv.com>
To: "dfdl-wg@ogf.org" <dfdl-wg@ogf.org>
Date: 30/08/2012 14:14
Subject: [DFDL-WG] defining dfdl:terminator and dfdl: initiator using length
Sent by: dfdl-wg-bounces@ogf.org

Hello!

Is it possible to define the initiator and terminator using their length? I know my data will have an initiator and a terminator, but not what they will be, only that they will exist and their length.
If it’s not possible, what is the best way to accomplish this?

R,
Miguel

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