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ATA CMP Paragraph Numbering

- Thursday, 14th July 2022

What's going on with the ATA CMP first level paragraph numbering!?

Click image to enlarge

Docuneering - ATA CMP - Paragraph numbering highlighted

If you’re anything like me then, as a seasoned S1000D user, when you first viewed an ATA Component Maintenance Publication (CMP), you will have questioned what on earth is going on with the first level paragraph numbering ... they seem to flow from one data module to another!

Well, that is exactly what’s going on and here’s why... an ATA CMP is broken down into Sections and Topics:

Screenshots from the ATA_Spec1000BR_4.2_2021.2 spec
(Click an image to enlarge)

Docuneering - ATA CMP - Sections and Topics

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-1 - Page 133


Each Section has multiple Topics and each Topic can have multiple Data Modules.

The following rules apply to separating Sections, Topics and Data Modules:


Docuneering - ATA CMP - Section, Topic and Data Module Separators

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-2 - Page 140


Example of a Section separator:


Docuneering - ATA CMP - Section separator

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-2 - Page 141


Example of a Topic separator (with the start of a Data Module):


Docuneering - ATA CMP - Topic separator

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-2 - Page 142


Example of Data Module separators (End of one Data Module and then the start of another):


Docuneering - ATA CMP - Data Module separators

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-2 - Page 143


Example of End of Data Module,
End of Topic and
End of Section:


Docuneering - ATA CMP - End of Data Module, Topic and Section

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-2 - Page 144


Now that we understand a Topic can have multiple Data Modules, we can now focus specifically on the first level paragraph numbering so, here’s what the spec says:


Docuneering - ATA CMP - Paragraph numbering rules

Source: ATA_Spec1000BR_4.2_2021.2 - Section 3-2-2 - Page 147

Quote: “...when multiple data modules are used within the same topic, the first level of paragraph numbering will continue in sequence with the next data module.”


And so there you have it ... that’s why the ATA CMP first level numbering is different from any standard S1000D output.

We hope this was helpful!

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