how to use component block

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Imported from previous forum

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Currently I am confused about the component block.
Is there someone can give me a specific example to show me how to use component block.
Thanks in advance
Lswallow

3

Component blocks are not relevant for a tag=value encoding unless they are repeating. Please provide more detail to your question. Non-repeating components allow to structure messages better and to re-use elements in multiple places, e.g. the block.

Currently I am confused about the component block.
Is there someone can give me a specific example to show me how to use component block.
Thanks in advance
Lswallow

4

Thanks for your explaination first.
I’m sorry I can’t understand what you have say clearly.Do you mean that I should insert these tags of the component block I need into my messages if it has repeating groups？if so,how should I do if it has no repeating groups.

Component blocks are not relevant for a tag=value encoding unless they are repeating. Please provide more detail to your question. Non-repeating components allow to structure messages better and to re-use elements in multiple places, e.g. the block.

Currently I am confused about the component block.
Is there someone can give me a specific example to show me how to use component block.
Thanks in advance
Lswallow

5

I think your question is more basic in nature. Please take a look at the FIX 5.0 SP2 Errata Specification Volume 1 which explains the tag=value syntax, page 20-21 (http://www.fixprotocol.org/documents/5905/FIX-5.0_SP2_VOL-1_w_Errata_20110818.pdf).
Some fields outside of repeating groups are required, most are optional. If it is a repeating group then the NoXXX field and the first field always need to be present. Additional fields may have to be present if the description contains a sentence like “Conditionally required when NoXXX>0”. Otherwise you choose the fields you need to fulfill your business requirements. Component blocks that are non-repeating require no special treatment in tag=value syntax, they are just a list of (optional) fields in the message. If the component block is the first element of a repeating group then the first field of the component block is required because it also represents the first field of the repeating group.

Thanks for your explaination first.
I’m sorry I can’t understand what you have say clearly.Do you mean that I should insert these tags of the component block I need into my messages if it has repeating groups？if so,how should I do if it has no repeating groups.

Component blocks are not relevant for a tag=value encoding unless they are repeating. Please provide more detail to your question. Non-repeating components allow to structure messages better and to re-use elements in multiple places, e.g. the block.

Currently I am confused about the component block.
Is there someone can give me a specific example to show me how to use component block.
Thanks in advance
Lswallow