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| TDS delimiter question? |
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| TonyD |
 Posted: Wed Oct 21, 2009 4:47 pm Post subject: TDS delimiter question? |
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Knight
Joined: 15 May 2001
Posts: 540
Location: New Zealand
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I have a tagged message format in which the tag is preceded with '&', as in:
&Product=AAA&Type=BBB&Price=CCC&Quantity=DDD
As far as I know TDS does not support a 'pre-limiter'. I have therefore defined the format as 'tagged/delimited', with '&' as the delimiter, with the tag for the first field as '&Product' and allowing an absent delimiter at the end of the type.
This seems to work OK. However I was wondering if there was any other way I could have defined this structure? |
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| mqjeff |
| Posted: Wed Oct 21, 2009 4:52 pm Post subject: Re: TDS delimiter question? |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| TonyD wrote: |
| IAs far as I know TDS does not support a 'pre-limiter'. |
Not by such a name, no.
| TonyD wrote: |
| I have therefore defined the format as 'tagged/delimited', with '&' as the delimiter, with the tag for the first field as '&Product' and allowing an absent delimiter at the end of the type. |
Okay. That's clearly a workable option.
| TonyD wrote: |
| This seems to work OK. However I was wondering if there was any other way I could have defined this structure? |
I might have gone with a Group Indicator, myself.
But I really don't have a clear picture of your model. So I might have just gone with ensuring that every tag includes the &. |
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| TonyD |
| Posted: Wed Oct 21, 2009 5:23 pm Post subject: Re: TDS delimiter question? |
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Knight
Joined: 15 May 2001
Posts: 540
Location: New Zealand
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| mqjeff wrote: |
I might have gone with a Group Indicator, myself. |
Would this mean that each of the three elements in the example would have to be defined as a type?
| mqjeff wrote: |
But I really don't have a clear picture of your model. So I might have just gone with ensuring that every tag includes the &. |
I tried that, with no delimiter specified. It appeared to work for TDS, but did not map correctly from TDS to XML. It treated everything after '&Product=' as the value of that element, e.g.:
<Product='AAA&Type=BBB&Price=CCC&Quantity=DDD'> |
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| kimbert |
| Posted: Thu Oct 22, 2009 2:51 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5543
Location: Southampton
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What you've done is fine. & really is the delimiter - it just happens to occur before the first member of the structure as well as in between the other members. The technical description would be '& is a prefix delimiter'.
Personally, I would have put & as the Group Indicator on the outer type, so that the tag for Product is consistent with the tags for Type and Quantity.
| Quote: |
| and allowing an absent delimiter at the end of the type. |
No need for that in your case ( although it's harmless). In TDS, delimiters are 'infix' ( occur between type/group members). That setting controls whether you are allowed to omit the delimiters for omitted trailing members of the type/group. |
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