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Parsing '&' in Esql code

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rock33

Posted: Sun Sep 22, 2013 11:18 am Post subject: Parsing '&' in Esql code

Novice

Joined: 22 Mar 2013
Posts: 12

Hi

Is anyone knows how to parse '&' to the target xml. It is an hardcoded value at the compute node and the incoming parser is XMLNSC.

Ex:

Source attribute: <name id='&en' />

Expected target attribute: <name id='&en' />

Actual target attribute: <name id='&ampen' />

How to avoid append this 'amp' text to '&'.

Any advice would be appreciated.

fjb_saper

Posted: Sun Sep 22, 2013 11:34 am Post subject: Re: Parsing '&' in Esql code

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

rock33 wrote:

Don't worry. &en is illegal XML. The correct XML value is <name id='&en' />
When extracted from the XML it will automatically revert to &en.

& is one of those values that HAVE to be escaped in XML.

Code:

SET ref.name.(XMLNSC.attr)id='&en';
-- will result in <name id='&en' />

Have fun

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rock33

Posted: Sun Sep 22, 2013 11:48 am Post subject:

Novice

Joined: 22 Mar 2013
Posts: 12

Thanks for the reply fjb_saper.

My target is fileOutput node.

Below is the line in the compute node.
SET OutputRoot.XMLNSC.name.(XMLNSC.Attribute)ID = '&en';

Outcome :

<name ID="&amp;en;" />

Issue still exists.

goffinf

Posted: Sun Sep 22, 2013 12:07 pm Post subject:

Chevalier

Joined: 05 Nov 2005
Posts: 401

rock33 wrote:

Read fjb_saper's answer again (carefully).

In your code, Broker will convert the first & to the legal escape sequence & and then add the string literal amp;en as indeed you have found.

Fraser.

aggarwal.intouch

Posted: Mon Sep 23, 2013 1:43 am Post subject:

Acolyte

Joined: 30 May 2011
Posts: 56
Location: India

When the XMLNS parser generates a bit stream from a message tree, occurrences of ampersand (&), less than (<), greater than (>), double quotation mark ("), and apostrophe ('), within the attribute value, are replaced by the predefined XML entities &, <, >, ", and '.

jsware

Posted: Mon Sep 23, 2013 2:57 am Post subject:

Chevalier

Joined: 17 May 2001
Posts: 455

rock33 wrote:

Use the following line instead:
SET OutputRoot.XMLNSC.name.(XMLNSC.Attribute)ID = '&en';
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John
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rock33

Posted: Mon Sep 23, 2013 4:53 am Post subject:

Novice

Joined: 22 Mar 2013
Posts: 12

[quote="jsware"]

rock33 wrote:

Use the following line instead:
SET OutputRoot.XMLNSC.name.(XMLNSC.Attribute)ID = '&en';

Have you tested jsware the above line of code?

jsware

Posted: Mon Sep 23, 2013 5:06 am Post subject:

Chevalier

Joined: 17 May 2001
Posts: 455

[quote="rock33"]

jsware wrote:

rock33 wrote:

Use the following line instead:
SET OutputRoot.XMLNSC.name.(XMLNSC.Attribute)ID = '&en';

Have you tested jsware the above line of code?

Not specifically - have you? What happens?
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Regards
John
The pain of low quaility far outlasts the joy of low price.

jsware

Posted: Mon Sep 23, 2013 5:53 am Post subject:

Chevalier

Joined: 17 May 2001
Posts: 455

Looking again at what you want:

<name ID='&en'>

This is invalid XML as fjb_saber mentioned. So are you asking how you can produce an invalid XML document containing an unmarked-up ampersand?

What I suggested will produce:

<name ID='&en'>

which is the XMLNSC parser working correctly.

If you are expecting '&en' to be an XML entity (like &) then &en is slightly incorrect. All XML entities are in the form '&name;' - beginning with ampersand and ending with semicolon. &en is not a valid entity name format - just like &amp is incorrect too - its &

To create inline DTD's that define custom XML entities, see http://pic.dhe.ibm.com/infocenter/wmbhelp/v9r0m0/topic/com.ibm.etools.mft.doc/ac67190_.htm for details.

If you are expecting the XMLNSC parser which, by design, produces well formed XML, to produce bad XML then that is going to be a bit more difficult.
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Regards
John
The pain of low quaility far outlasts the joy of low price.

rock33

Posted: Thu Sep 26, 2013 6:05 am Post subject:

Novice

Joined: 22 Mar 2013
Posts: 12

Thanks jsware for the Explanation.

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