Simplified XML

[Cory Casanave <cory-c@dataaccess.com>]

We have had some discussion of "simplified XML representation" of a BP Meta
model.  Enclosed is a fragment of the output from the component definition
and assembly tool we are building based on the CCA (OMG Component
Collaboration Architecture).  While the tag names are not the same and would
require some adjustment, it gives and idea of how simple a XML spec of an
XML interface can be.  The XMI for the equivalent UML profile would be much
larger (But each can be 100% produced from the other).  I have also included
a screen shot of the graphical representation in the tool.

Note that we are not "proposing" this syntax as is and it is not yet
formally specified, but we feel it makes a good start and could be
formalized easily.

Regards,
Cory Casanave

 <<SampleOrder.doc>> 
--------------------------------------------------------

<?xml version="1.0" ?>
<ComponentX>
  <package name="dat">
    <package name="comp">

      <provides name="OrderInterface">
        <sends-xml name="OrderConfirmation" type="OrderConfirmation"/>
        <recieves-xml name="Order" type="Order"/>
        <sends-xml name="OrderDeclined" type="OrderDeclined"/>
      </provides>

      <component name="OrderPlacer" >
        <uses name="OrderInterface"/>
      </component>

      <component name="OrderTaker" >
        <provides name="OrderInterface"/>
      </component>

      <component name="OrderSystem" >
        <component name="OrderPlacer" extends="/dat/comp/OrderPlacer" />
        <component name="OrderTaker" extends="/dat/comp/OrderTaker" />
        <wire to="OrderTaker/OrderInterface"
from="OrderPlacer/OrderInterface"/>
      </component>

    </package>
    <typePackage name="types">
      <var name="Order" type="composite" constraint="required">
        <var name="OrderNumber" extends="/dat/types/OrderNumber"/>
        <var name="CustomerID" extends="/dat/types/CustomerID"/>
        <var name="Date" extends="/dat/types/Date"/>
        <var name="LineItem" extends="/dat/types/LineItem"
constraint="zeroOrMore">
          <var name="PartID" extends="/dat/types/PartID"/>
          <var name="Quantity" extends="/dat/types/Quantity"/>
          <var name="Price" extends="/dat/types/Price"/>
        </var>
        <var name="Total" extends="/dat/types/Total"/>
      </var>
      <var name="OrderNumber" type="int" constraint="required"/>
      <var name="CustomerID" type="char" constraint="required"/>
      <var name="Date" type="char" constraint="required"/>
      <var name="LineItem" type="composite" constraint="required"/>
      <var name="PartID" type="char" constraint="required"/>
      <var name="Quantity" type="float" constraint="required"/>
      <var name="Price" type="float" constraint="required"/>
      <var name="Total" type="float" constraint="required"/>
      <var name="OrderConfirmation" type="composite" constraint="required">
        <var name="OrderNumber" extends="/dat/types/OrderNumber"/>
        <var name="Total" extends="/dat/types/Total"/>
      </var>
      <var name="OrderDeclined" type="composite" constraint="required">
        <var name="OrderNumber" extends="/dat/types/OrderNumber"/>
        <var name="Reason" extends="/dat/types/Reason"
constraint="optional"/>
      </var>
      <var name="Reason" type="char" constraint="required"/>
    </typePackage>
</ComponentX>

SampleOrder.doc