Eclipse Community Forums: EMF » Instance of ECore Model

Home » Modeling » EMF » Instance of ECore Model(Use Of XMI for creating instance of ECore Model, Need of xmi:id atttribute)

Instance of ECore Model [message #656737]

Mon, 28 February 2011 06:20

Eclipse User

Hello,

(Sample Example)
My ECore model's textual format looks like this,

<?xml version="1.0" encoding="UTF-8"?>
<ecore:EPackage xmi:version="2.0"
xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="mymodel"
nsURI="http://mymodel/1.0" nsPrefix="mymodel">
<eClassifiers xsi:type="ecore:EClass" name="Order">
<eStructuralFeatures xsi:type="ecore:EAttribute" name="id" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
<eStructuralFeatures xsi:type="ecore:EReference" name="customer" lowerBound="1"
eType="#//Customer" containment="true"/>
<eStructuralFeatures xsi:type="ecore:EReference" name="articles" upperBound="-1"
eType="#//Article" containment="true"/>
</eClassifiers>
<eClassifiers xsi:type="ecore:EClass" name="Customer">
<eStructuralFeatures xsi:type="ecore:EAttribute" name="name" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
<eStructuralFeatures xsi:type="ecore:EAttribute" name="address" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
</eClassifiers>
<eClassifiers xsi:type="ecore:EClass" name="Article">
<eStructuralFeatures xsi:type="ecore:EAttribute" name="description" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
<eStructuralFeatures xsi:type="ecore:EAttribute" name="price" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloat"/>
</eClassifiers>
<eClassifiers xsi:type="ecore:EClass" name="OrderSystem">
<eStructuralFeatures xsi:type="ecore:EReference" name="customers" upperBound="-1"
eType="#//Customer" containment="true"/>
<eStructuralFeatures xsi:type="ecore:EReference" name="orders" upperBound="-1"
eType="#//Order" containment="true"/>
<eStructuralFeatures xsi:type="ecore:EReference" name="articles" upperBound="-1"
eType="#//Article" containment="true"/>
</eClassifiers>
</ecore:EPackage>

Now I want to create an XMI instance of above MyModel.ecore.
But it asks me only for particular object only as an example OrederSystem.

In fact I want to create something like this,

XML ECORE prolog....
<OrderSystem xmi:id="123"..../>
<Customer xmi:id="123" />
<Article xmi:id="123"/>

So that later in this XMI file I can refer customer with id 123...

Is it posssible? If yes then what should be XML Prolog? As I am somewhat new to this, improve me if I am wrong anywhere..

[Updated on: Mon, 28 February 2011 06:50] by Moderator

Re: Instance of ECore Model [message #656795 is a reply to message #656737]

Mon, 28 February 2011 10:55

Eclipse User

Dharam,

Comments below.

Dharam wrote:
> Hello,
>
> (Sample Example)
> My ECore model's textual format looks like this,
>
> <?xml version="1.0" encoding="UTF-8"?>
> <ecore:EPackage xmi:version="2.0"
> xmlns:xmi="http://www.omg.org/XMI"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="mymodel"
> nsURI="http://mymodel/1.0" nsPrefix="mymodel">
> <eClassifiers xsi:type="ecore:EClass" name="Order">
> <eStructuralFeatures xsi:type="ecore:EAttribute" name="id"
> eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
> <eStructuralFeatures xsi:type="ecore:EReference" name="customer"
> lowerBound="1"
> eType="#//Customer" containment="true"/>
> <eStructuralFeatures xsi:type="ecore:EReference" name="articles"
> upperBound="-1"
> eType="#//Article" containment="true"/>
> </eClassifiers>
> <eClassifiers xsi:type="ecore:EClass" name="Customer">
> <eStructuralFeatures xsi:type="ecore:EAttribute" name="name"
> eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
> <eStructuralFeatures xsi:type="ecore:EAttribute" name="address"
> eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
> </eClassifiers>
> <eClassifiers xsi:type="ecore:EClass" name="Article">
> <eStructuralFeatures xsi:type="ecore:EAttribute" name="description"
> eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
> <eStructuralFeatures xsi:type="ecore:EAttribute" name="price"
> eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EFloat"/>
> </eClassifiers>
> <eClassifiers xsi:type="ecore:EClass" name="OrderSystem">
> <eStructuralFeatures xsi:type="ecore:EReference" name="customers"
> upperBound="-1"
> eType="#//Customer" containment="true"/>
> <eStructuralFeatures xsi:type="ecore:EReference" name="orders"
> upperBound="-1"
> eType="#//Order" containment="true"/>
> <eStructuralFeatures xsi:type="ecore:EReference" name="articles"
> upperBound="-1"
> eType="#//Article" containment="true"/>
> </eClassifiers>
> </ecore:EPackage>
>
> Now I want to create an XMI instance of above MyModel.ecore.
> But it asks me only for particular object only as an example
> OrederSystem.
> In fact I want to create something like this,
>
> XML ECORE prolog....
> <OrderSystem xmi:id="123"..../>
OrderSystems contain customers, so I'm not sure why you're expecting to
keep them at the root of the XML. You can create them as children of
OrderSystem from the context menu for the initial OrderSystem you create.
> <Customer xmi:id="123" />
> <Article cmi:id="123"/>
>
> So that later in this XMI file I can refer customer with id 123...
>
> Is it posssible? If yes then what should be XML Prolog? As I am
> somewhat new to this, improve me if I am wrong anywhere..

Previous Topic:	[Teneo] Storing references to Ecore Model Elements - External annotation
Next Topic:	Analyzing accessible EMF metamodels for project

Goto Forum:

-=] Back to Top [=-

Current Time: Tue Jul 08 15:06:49 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter