Schémas de l'outil Annotation Research Tool (exemple d'application EDM)

Les entités implémentées dans cette application utilisent le modèle EDM (Modèle de données d'entité) et sont déclarées et définies dans le langage CSDL (Conceptual Schema Definition Language). Trois entités sont utilisées pour contenir des données sur les références Web, les descripteurs de référence et les contacts. Une quatrième entité est nécessaire pour contenir des paires d'identificateurs qui connectent des références et des contacts. Pour plus d'informations sur les entités et les associations, voir Spécifications EDM.

Chaque contact peut être associé à de nombreuses références et l'association entre des contacts et des références doit être implémentée sous la forme d'une association plusieurs-à-plusieurs. Chaque descripteur de référence contient des données sur une seule référence Web, mais une référence peut être liée à de nombreux descripteurs de référence ; l'association entre des références et des descripteurs de référence est implémentée en tant qu'association plusieurs-à-un.

Le segment de schéma ci-dessous contient la déclaration pour l'entité Reference. La propriété Key est spécifiée comme propriété ReferenceID. Il existe trois propriétés supplémentaires : DocumentType, DocumentText et Locator. La propriété Locator contient l'URL utilisée pour trouver la référence Web. Bien que DocumentType et DocumentText ne soient pas utilisés par le code d'application dans cet exemple, ils sont fournis pour une expérimentation supplémentaire qui utilise les fonctionnalités de recherche de texte intégral de SQL Server. Pour plus d'informations sur les schémas, voir Schémas (EDM).

Une propriété de navigation nommée RefDescriptors fournit un raccourci dans le code d'application aux instances de l'entité ReferenceDescriptor associées à une instance du type Reference. Pour plus d'informations sur les propriétés de navigation, voir Propriétés de navigation (EDM).

  <EntityType Name="Reference">
    <Key>
      <PropertyRef Name="ReferenceID" />
    </Key>
    <Property Name="ReferenceID" Type="Guid" Nullable="false" />
    <Property Name="DocumentType" Type="String" MaxLength="8" />
    <Property Name="DocumentText" Type="String" MaxLength="4000" />
    <Property Name="Locator" Type="String" Nullable="false"
         MaxLength="500" />
    <NavigationProperty Name="RefDescriptors"
         Relationship="Self.ReferenceDescriptor_Reference"
         FromRole="Reference" ToRole="ReferenceDescriptor" />
  </EntityType>

L'entité ReferenceDescriptor est déclarée et définie dans le segment de schéma suivant :

  <EntityType Name="ReferenceDescriptor">
    <Key>
      <PropertyRef Name="DescriptorID" />
    </Key>
    <Property Name="DescriptorID" Type="Guid" Nullable="false" />
    <Property Name="Annotation" Type="String" MaxLength="2000" />
    <Property Name="Keyword" Type="String" MaxLength="50" />
    <NavigationProperty Name="Reference"
          Relationship="Self.ReferenceDescriptor_Reference"
          FromRole="ReferenceDescriptor" ToRole="Reference" />
  </EntityType>

Cette entité contient une propriété Annotation et une propriété Keyword. Au moins une de ces propriétés peut être utilisée pour catégoriser et décrire un Reference de page Web. L'une ou l'autre propriété peut avoir la valeur Null, mais l'une ou l'autre doit être assignée. L'interface utilisateur dans l'application peut valider si cela est requis.

Une propriété de navigation sur l'entité Reference utilise le Association défini dans le segment de schéma suivant :

  <Association Name="ReferenceDescriptor_Reference">
    <End Role="Reference" Type="ResearchCollaborationDataModel.Reference" Multiplicity="1" />
    <End Role="ReferenceDescriptor"
       Type="ResearchCollaborationDataModel.ReferenceDescriptor"
       Multiplicity="*" />
  </Association>

Les balises <End> utilisées dans cette association indiquent des entités Reference et ReferenceDescriptor dans une relation un-à-plusieurs. Chaque Reference peut être décrit par un nombre quelconque de descripteurs. Une fois le modèle objet créé, la propriété de navigation fonctionne comme une collection d'instances RefDescriptor. La propriété de navigation génère comme ObjectQuery dans le modèle de données programmable.

Les définitions End et Role dans cette association sont synonymes.

Mise en œuvre d'une association plusieurs-à-plusieurs

Étant donné qu'un nombre quelconque de References peuvent être associés à un nombre quelconque de Contacts, l'association entre ces entités doit être implémentée comme une association plusieurs-à-plusieurs. L'association plusieurs-à-plusieurs requiert une table de liens dans l'implémentation de stockage et une déclaration d'entité dans le schéma conceptuel et les métadonnées de stockage pour représenter la table de liens. Les associations sont ensuite déclarées entre l'entité de lien et les entités Contact et Reference.

La déclaration d'entité ci-dessous en langage CSDL utilise une table de liens dans la base de données. Une déclaration similaire en langage SSDL (Store Schema Definition Language) fournit des métadonnées sur la table de liens.

  <EntityType Name="ContactPersonReference">
    <Key>
      <PropertyRef Name="ContactPersonRefID" />
    </Key>
    <Property Name="ContactPersonRefID" Type="Guid" Nullable="false" />
      <NavigationProperty Name="RelatedReference"
          Relationship="Self.LinkTable_Reference"
          FromRole="ContactPersonReference" ToRole="Reference" />
      <NavigationProperty Name="RelatedContact"
          Relationship="Self.LinkTable_ContactPerson"
          FromRole="ContactPersonReference" ToRole="ContactPerson" />
  </EntityType>

La propriété Key de l'identité est la seule propriété déclarée dans ce schéma. Les propriétés de navigation représentent des collections d'instances Reference associées et d'instances ContactPerson associées. Dans la table de données, des colonnes contiennent des paires de GUID ReferenceID et ContactPersonID.

Deux associations prennent en charge la relation plusieurs-à-plusieurs : LinkTable_Reference et LinkTable_ContactPerson. Ces associations sont définies dans la syntaxe suivante :

  <AssociationSet Name="LinkTable_Reference"
      Association="ResearchCollaborationDataModel.LinkTable_Reference">
    <End Role="Reference" EntitySet="Reference" />
    <End Role="ContactPersonReference"
       EntitySet="ContactPersonReference" />
  </AssociationSet>

  <Association Name="LinkTable_ContactPerson">
    <End Role="ContactPerson" Type="ResearchCollaborationDataModel.ContactPerson" Multiplicity="1" />
    <End Role="ContactPersonReference"
       Type="ResearchCollaborationDataModel.ContactPersonReference"
       Multiplicity="*" />
  </Association>

Chacune de ces associations est définie en tant qu'association un-à-plusieurs, mais les propriétés de navigation sur l'entité de lien connectent des collections de paires Reference/ContactPerson.

Schémas et spécification de mappage complets

Les sections suivantes contiennent les schémas et la spécification de mappage utilisés par cet exemple.

Schéma conceptuel (CSDL)

Les entités et les associations utilisées par l'application sont définies en langage CSDL. Le modèle objet est créé à partir de cette structure de schéma.

<?xml version="1.0" encoding="utf-8"?>
   <Schema Namespace="ResearchCollaborationDataModel" Alias="Self"
        xmlns="https://schemas.microsoft.com/ado/2006/04/edm">

  <EntityType Name="Reference">
    <Key>
      <PropertyRef Name="ReferenceID" />
    </Key>
    <Property Name="ReferenceID" Type="Guid" Nullable="false" />
    <Property Name="DocumentType" Type="String" />
    <Property Name="DocumentText" Type="String" />
    <Property Name="Locator" Type="String" Nullable="false" />
    <NavigationProperty Name="RefDescriptors"
 Relationship="Self.ReferenceDescriptor_Reference" FromRole="Reference"
 ToRole="ReferenceDescriptor" />
  </EntityType>

  <EntityType Name="ReferenceDescriptor">
    <Key>
      <PropertyRef Name="DescriptorID" />
    </Key>
    <Property Name="DescriptorID" Type="Guid" Nullable="false" />
    <Property Name="Annotation" Type="String" />
    <Property Name="Keyword" Type="String" />
    <NavigationProperty Name="Reference"
        Relationship="Self.ReferenceDescriptor_Reference"
        FromRole="ReferenceDescriptor" ToRole="Reference" />
  </EntityType>

  <EntityType Name="ContactPerson">
    <Key>
      <PropertyRef Name="ContactPersonID" />
    </Key>
    <Property Name="ContactPersonID" Type="Guid" Nullable="false" />
    <Property Name="LastName" Type="String" Nullable="false" />
    <Property Name="FirstName" Type="String" Nullable="false" />
    <Property Name="Title" Type="String" />
    <Property Name="Email" Type="String" Nullable="false" />
  </EntityType>

  <EntityType Name="ContactPersonReference">
    <Key>
      <PropertyRef Name="ContactPersonRefID" />
    </Key>
    <Property Name="ContactPersonRefID" Type="Guid" Nullable="false" />
      <NavigationProperty Name="RelatedReference" Relationship="Self.LinkTable_Reference"
            FromRole="ContactPersonReference" ToRole="Reference" />
      <NavigationProperty Name="RelatedContact" Relationship="Self.LinkTable_ContactPerson"
        FromRole="ContactPersonReference" ToRole="ContactPerson" />
  </EntityType>

  <Association Name="ReferenceDescriptor_Reference">
    <End Role="Reference" Type="ResearchCollaborationDataModel.Reference" Multiplicity="1" />
    <End Role="ReferenceDescriptor" Type="ResearchCollaborationDataModel.ReferenceDescriptor" Multiplicity="*" />
  </Association>

  <Association Name="LinkTable_ContactPerson">
    <End Role="ContactPerson" Type="ResearchCollaborationDataModel.ContactPerson" Multiplicity="1" />
    <End Role="ContactPersonReference" Type="ResearchCollaborationDataModel.ContactPersonReference" Multiplicity="*" />
  </Association>

  <Association Name="LinkTable_Reference">
    <End Role="Reference" Type="ResearchCollaborationDataModel.Reference" Multiplicity="1" />
    <End Role="ContactPersonReference"
 Type="ResearchCollaborationDataModel.ContactPersonReference"
 Multiplicity="*" />
  </Association>

  <EntityContainer Name="ResearchCollaborationData">
      
    <EntitySet Name="ContactPerson"
 EntityType="ResearchCollaborationDataModel.ContactPerson" />
    <EntitySet Name="ContactPersonReference"
 EntityType="ResearchCollaborationDataModel.ContactPersonReference" />
    <EntitySet Name="Reference" EntityType="ResearchCollaborationDataModel.Reference" />
    <EntitySet Name="ReferenceDescriptor"
 EntityType="ResearchCollaborationDataModel.ReferenceDescriptor" />
    
    <AssociationSet Name="LinkTable_ContactPerson"
 Association="ResearchCollaborationDataModel.LinkTable_ContactPerson">
      <End Role="ContactPerson" EntitySet="ContactPerson" />
      <End Role="ContactPersonReference"
           EntitySet="ContactPersonReference" />
    </AssociationSet>
    
    <AssociationSet Name="LinkTable_Reference"
 Association="ResearchCollaborationDataModel.LinkTable_Reference">
      <End Role="Reference" EntitySet="Reference" />
      <End Role="ContactPersonReference"
            EntitySet="ContactPersonReference" />
    </AssociationSet>
    
    <AssociationSet Name="ReferenceDescriptor_Reference"
 Association="ResearchCollaborationDataModel.ReferenceDescriptor_Reference">
      <End Role="Reference" EntitySet="Reference" />
      <End Role="ReferenceDescriptor" EntitySet="ReferenceDescriptor" />
    </AssociationSet>

  </EntityContainer>

</Schema>

Schéma des métadonnées de stockage (SSDL)

Les métadonnées sur les structures de stockage utilisées par les applications EDM sont définies en langage SSDL.

<?xml version="1.0" encoding="utf-8"?>
  <Schema Namespace="ResearchCollaborationDataTarget" Alias="Self"
      Provider="System.Data.SqlClient"
      ProviderManifestToken="2005"
      xmlns="https://schemas.microsoft.com/ado/2006/04/edm/ssdl">

  <EntityType Name="ContactPerson">
    <Key>
      <PropertyRef Name="ContactPersonID" />
    </Key>
    <Property Name="ContactPersonID" Type="uniqueidentifier"
         Nullable="false" />
    <Property Name="LastName" Type="nvarchar" Nullable="false"
         MaxLength="50" />
    <Property Name="FirstName" Type="nvarchar" Nullable="false"
         MaxLength="50" />
    <Property Name="Title" Type="nvarchar" MaxLength="50" />
    <Property Name="Email" Type="nvarchar" Nullable="false"
         MaxLength="50" />
  </EntityType>

  <EntityType Name="ContactPersonReference">
    <Key>
      <PropertyRef Name="ContactPersonRefID" />
    </Key>
    <Property Name="ContactPersonID" Type="uniqueidentifier"
          Nullable="false" />
    <Property Name="ReferenceID" Type="uniqueidentifier"
          Nullable="false" />
    <Property Name="ContactPersonRefID" Type="uniqueidentifier"
          Nullable="false" />
  </EntityType>

  <EntityType Name="Reference">
    <Key>
      <PropertyRef Name="ReferenceID" />
    </Key>
    <Property Name="ReferenceID" Type="uniqueidentifier"
         Nullable="false" />
    <Property Name="DocumentType" Type="nvarchar" MaxLength="8" />
    <Property Name="DocumentText" Type="nvarchar" MaxLength="4000" />
    <Property Name="Locator" Type="nvarchar" Nullable="false"
         MaxLength="500" />
  </EntityType>

  <EntityType Name="ReferenceDescriptor">
    <Key>
      <PropertyRef Name="DescriptorID" />
    </Key>
    <Property Name="DescriptorID" Type="uniqueidentifier"
           Nullable="false" />
    <Property Name="ReferenceID" Type="uniqueidentifier"
           Nullable="false" />
    <Property Name="Annotation" Type="nvarchar" MaxLength="2000" />
    <Property Name="Keyword" Type="nvarchar" MaxLength="50" />
  </EntityType>

  <Association Name="LinkTable_ContactPerson">
    <End Role="ContactPerson"
          Type="ResearchCollaborationDataTarget.ContactPerson" Multiplicity="1"/>
    <End Role="ContactPersonReference"
       Type="ResearchCollaborationDataTarget.ContactPersonReference"
       Multiplicity="*" />
    <ReferentialConstraint>
      <Principal Role="ContactPerson">
        <PropertyRef Name="ContactPersonID" />
      </Principal>
      <Dependent Role="ContactPersonReference">
        <PropertyRef Name="ContactPersonID" />
      </Dependent>
    </ReferentialConstraint>
  </Association>

  <Association Name="LinkTable_Reference">
    <End Role="Reference"
         Type="ResearchCollaborationDataTarget.Reference"
         Multiplicity="1" />
    <End Role="ContactPersonReference"
       Type="ResearchCollaborationDataTarget.ContactPersonReference"
       Multiplicity="*" />
    <ReferentialConstraint>
      <Principal Role="Reference">
        <PropertyRef Name="ReferenceID" />
      </Principal>
      <Dependent Role="ContactPersonReference">
        <PropertyRef Name="ReferenceID" />
      </Dependent>
    </ReferentialConstraint>
  </Association>

  <Association Name="ReferenceDescriptor_Reference">
    <End Role="Reference"
   Type="ResearchCollaborationDataTarget.Reference" Multiplicity="1" />
    <End Role="ReferenceDescriptor"
           Type="ResearchCollaborationDataTarget.ReferenceDescriptor"
           Multiplicity="*" />
    <ReferentialConstraint>
      <Principal Role="Reference">
        <PropertyRef Name="ReferenceID" />
      </Principal>
      <Dependent Role="ReferenceDescriptor">
        <PropertyRef Name="ReferenceID" />
      </Dependent>
    </ReferentialConstraint>
  </Association>

  <EntityContainer Name="dbo">
    <EntitySet Name="ContactPerson"
       EntityType="ResearchCollaborationDataTarget.ContactPerson" />
    <EntitySet Name="ContactPersonReference"
 EntityType="ResearchCollaborationDataTarget.ContactPersonReference"/>
    <EntitySet Name="Reference"
       EntityType="ResearchCollaborationDataTarget.Reference" />
    <EntitySet Name="ReferenceDescriptor"
   EntityType="ResearchCollaborationDataTarget.ReferenceDescriptor"/>

    <AssociationSet Name="LinkTable_ContactPerson"
  Association="ResearchCollaborationDataTarget.LinkTable_ContactPerson">
      <End Role="ContactPerson" EntitySet="ContactPerson" />
      <End Role="ContactPersonReference"
          EntitySet="ContactPersonReference" />
    </AssociationSet>
    <AssociationSet Name="LinkTable_Reference"
    Association="ResearchCollaborationDataTarget.LinkTable_Reference">
      <End Role="Reference" EntitySet="Reference" />
      <End Role="ContactPersonReference"
          EntitySet="ContactPersonReference" />
    </AssociationSet>

    <AssociationSet Name="ReferenceDescriptor_Reference"
 Association="ResearchCollaborationDataTarget.ReferenceDescriptor_Reference">
      <End Role="Reference" EntitySet="Reference" />
      <End Role="ReferenceDescriptor" EntitySet="ReferenceDescriptor" />
    </AssociationSet>
  </EntityContainer>

</Schema>

Spécification de mappage (MSL)

Les entités et les associations définies en langage CSDL sont mappées aux métadonnées de stockage en langage SSDL à l'aide du langage MSL (Mapping Specification Language).

<?xml version="1.0" encoding="utf-8"?>
<Mapping Space="C-S"
    xmlns:edm="urn:schemas-microsoft-com:windows:storage:mapping:CS"
    xmlns="urn:schemas-microsoft-com:windows:storage:mapping:CS">

  <edm:EntityContainerMapping
           CdmEntityContainer="ResearchCollaborationData"
           StorageEntityContainer="dbo">
    <edm:EntitySetMapping Name="ContactPerson">
      <edm:EntityTypeMapping
         TypeName="ResearchCollaborationDataModel.ContactPerson">
        <edm:MappingFragment StoreEntitySet="ContactPerson">
          <edm:ScalarProperty Name="ContactPersonID"
               ColumnName="ContactPersonID" />
          <edm:ScalarProperty Name="LastName" ColumnName="LastName"/>
          <edm:ScalarProperty Name="FirstName" 
               ColumnName="FirstName" />
          <edm:ScalarProperty Name="Title" ColumnName="Title" />
          <edm:ScalarProperty Name="Email" ColumnName="Email" />
        </edm:MappingFragment>
      </edm:EntityTypeMapping>
    </edm:EntitySetMapping>
    <edm:EntitySetMapping Name="ContactPersonReference">
      <edm:EntityTypeMapping
    TypeName="ResearchCollaborationDataModel.ContactPersonReference">
        <edm:MappingFragment StoreEntitySet="ContactPersonReference">
          <edm:ScalarProperty Name="ContactPersonRefID"
              ColumnName="ContactPersonRefID" />
        </edm:MappingFragment>
      </edm:EntityTypeMapping>
    </edm:EntitySetMapping>
    <edm:EntitySetMapping Name="Reference">
      <edm:EntityTypeMapping
            TypeName="ResearchCollaborationDataModel.Reference">
        <edm:MappingFragment StoreEntitySet="Reference">
          <edm:ScalarProperty Name="ReferenceID"
               ColumnName="ReferenceID" />
          <edm:ScalarProperty Name="DocumentType"
               ColumnName="DocumentType" />
          <edm:ScalarProperty Name="DocumentText"
               ColumnName="DocumentText" />
          <edm:ScalarProperty Name="Locator" 
               ColumnName="Locator" />
        </edm:MappingFragment>
      </edm:EntityTypeMapping>
    </edm:EntitySetMapping>
    <edm:EntitySetMapping Name="ReferenceDescriptor">
      <edm:EntityTypeMapping
       TypeName="ResearchCollaborationDataModel.ReferenceDescriptor">
        <edm:MappingFragment StoreEntitySet="ReferenceDescriptor">
          <edm:ScalarProperty Name="DescriptorID"
               ColumnName="DescriptorID" />
          <edm:ScalarProperty Name="Annotation" 
               ColumnName="Annotation" />
          <edm:ScalarProperty Name="Keyword" ColumnName="Keyword" />
        </edm:MappingFragment>
      </edm:EntityTypeMapping>
    </edm:EntitySetMapping>
    <edm:AssociationSetMapping Name="LinkTable_ContactPerson"
      TypeName="ResearchCollaborationDataModel.LinkTable_ContactPerson"
        StoreEntitySet="ContactPersonReference">
      <edm:EndProperty Name="ContactPerson">
        <edm:ScalarProperty Name="ContactPersonID"
              ColumnName="ContactPersonID" />
      </edm:EndProperty>
      <edm:EndProperty Name="ContactPersonReference">
        <edm:ScalarProperty Name="ContactPersonRefID"
             ColumnName="ContactPersonRefID" />
      </edm:EndProperty>
      <edm:Condition ColumnName="ContactPersonID" IsNull="false" />
    </edm:AssociationSetMapping>
    <edm:AssociationSetMapping Name="LinkTable_Reference"
         TypeName="ResearchCollaborationDataModel.LinkTable_Reference"
         StoreEntitySet="ContactPersonReference">
      <edm:EndProperty Name="Reference">
        <edm:ScalarProperty Name="ReferenceID" 
              ColumnName="ReferenceID" />
      </edm:EndProperty>
      <edm:EndProperty Name="ContactPersonReference">
        <edm:ScalarProperty Name="ContactPersonRefID"
             ColumnName="ContactPersonRefID" />
      </edm:EndProperty>
      <edm:Condition ColumnName="ReferenceID" IsNull="false" />
    </edm:AssociationSetMapping>
    <edm:AssociationSetMapping Name="ReferenceDescriptor_Reference"
  TypeName="ResearchCollaborationDataModel.ReferenceDescriptor_Reference"
  StoreEntitySet="ReferenceDescriptor">
      <edm:EndProperty Name="Reference">
        <edm:ScalarProperty Name="ReferenceID" 
            ColumnName="ReferenceID" />
      </edm:EndProperty>
      <edm:EndProperty Name="ReferenceDescriptor">
        <edm:ScalarProperty Name="DescriptorID"
            ColumnName="DescriptorID" />
      </edm:EndProperty>
      <edm:Condition ColumnName="ReferenceID" IsNull="false" />
    </edm:AssociationSetMapping>
  </edm:EntityContainerMapping>
</Mapping>

Le script ci-dessous peut être utilisé pour créer la base de données utilisée dans cet exemple. Pour créer la base de données et le schéma ResearchCollaborationData à l'aide de SQL Server Management Studio :

Dans le menu Fichier, pointez sur Nouveau, puis cliquez sur Requête de moteur de base de données.
Dans la boîte de dialogue Se connecter au moteur de base de données, tapez localhost ou le nom de l'instance de SQL Server, puis cliquez sur Se connecter.
Collez le script Transact-SQL fourni ci-dessous dans la fenêtre de requête, puis cliquez sur Exécuter.

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

USE [master];
GO

IF EXISTS (SELECT * FROM sys.databases 
WHERE name = 'ResearchCollaborationData')
DROP DATABASE ResearchCollaborationData;
GO

-- Create the database.
CREATE DATABASE ResearchCollaborationData;
GO

USE ResearchCollaborationData;
GO

IF NOT EXISTS (SELECT * FROM sys.objects 
WHERE object_id = OBJECT_ID(N'[dbo].[ContactPerson]') 
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[ContactPerson](
[ContactPersonID] [uniqueidentifier] NOT NULL,
[LastName] [nvarchar](50) NOT NULL,
[FirstName] [nvarchar](50) NOT NULL,
[Title] [nvarchar](50) NULL,
[Email] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_ContactPerson] PRIMARY KEY CLUSTERED 
(
[ContactPersonID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects 
WHERE object_id = OBJECT_ID(N'[dbo].[Reference]') 
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Reference](
[ReferenceID] [uniqueidentifier] NOT NULL,
[DocumentType] [nvarchar](8) NULL,
[DocumentText] [nvarchar](max) NULL,
[Locator] [nvarchar](500) NOT NULL,
 CONSTRAINT [PK_Reference] PRIMARY KEY CLUSTERED 
(
[ReferenceID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects 
WHERE object_id = OBJECT_ID(N'[dbo].[ContactPersonReference]') 
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[ContactPersonReference](
[ContactPersonID] [uniqueidentifier] NOT NULL,
[ReferenceID] [uniqueidentifier] NOT NULL,
[ContactPersonRefID] [uniqueidentifier] NOT NULL,
 CONSTRAINT [PK_ContactPersonReference] PRIMARY KEY CLUSTERED 
(
[ContactPersonRefID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects 
WHERE object_id = OBJECT_ID(N'[dbo].[ReferenceDescriptor]') 
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[ReferenceDescriptor](
[DescriptorID] [uniqueidentifier] NOT NULL,
[ReferenceID] [uniqueidentifier] NOT NULL,
[Annotation] [nvarchar](2000) NULL,
[Keyword] [nvarchar](50) NULL,
 CONSTRAINT [PK_ReferenceDescriptor] PRIMARY KEY CLUSTERED 
(
[DescriptorID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
IF NOT EXISTS (SELECT * FROM sys.foreign_keys 
WHERE object_id = OBJECT_ID(N'[dbo].[LinkTable_ContactPerson]') AND parent_object_id = 
OBJECT_ID(N'[dbo].[ContactPersonReference]'))
ALTER TABLE [dbo].[ContactPersonReference]  
WITH CHECK ADD  CONSTRAINT [LinkTable_ContactPerson] FOREIGN KEY([ContactPersonID])
REFERENCES [dbo].[ContactPerson] ([ContactPersonID])
GO
ALTER TABLE [dbo].[ContactPersonReference] CHECK CONSTRAINT [LinkTable_ContactPerson]
GO
IF NOT EXISTS (SELECT * FROM sys.foreign_keys 
WHERE object_id = OBJECT_ID(N'[dbo].[LinkTable_Reference]') AND parent_object_id = 
OBJECT_ID(N'[dbo].[ContactPersonReference]'))
ALTER TABLE [dbo].[ContactPersonReference]  
WITH CHECK ADD  CONSTRAINT [LinkTable_Reference] FOREIGN KEY([ReferenceID])
REFERENCES [dbo].[Reference] ([ReferenceID])
GO
ALTER TABLE [dbo].[ContactPersonReference] CHECK CONSTRAINT [LinkTable_Reference]
GO
IF NOT EXISTS (SELECT * FROM sys.foreign_keys 
WHERE object_id = OBJECT_ID(N'[dbo].[ReferenceDescriptor_Reference]') 
AND parent_object_id = OBJECT_ID(N'[dbo].[ReferenceDescriptor]'))
ALTER TABLE [dbo].[ReferenceDescriptor]  
WITH CHECK ADD  CONSTRAINT [ReferenceDescriptor_Reference] FOREIGN KEY([ReferenceID])
REFERENCES [dbo].[Reference] ([ReferenceID])
GO
ALTER TABLE [dbo].[ReferenceDescriptor] CHECK CONSTRAINT [ReferenceDescriptor_Reference]
GO

USE ResearchCollaborationData
GO

INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('12b18fe1-be82-486c-b248-00183aad2c88', '', '', 'https://msdn2.microsoft.com/en-us/data/aa937722.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('34bf3c5f-202a-45fe-af42-0a1d9bf489e2', '', '', 'https://msdn2.microsoft.com/en-us/library/190bkk9s.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('cfc4a592-296d-4b6f-b8fe-0e7a42b4a29a', '', '', 'https://blogs.msdn.com/adonet/archive/2007/01/30/entity-data-model-part-1.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('aad24f4c-c461-4d62-8723-6b52574311d1', '', '', 'https://www.microsoft.com/windows/directx/productinfo/overview/default.mspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('7d4a1c27-3046-4866-974f-81b1e4642719', '', '', 'https://msdn2.microsoft.com/en-us/library/ms269115.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('7b217f44-3ed0-492f-aaf6-8c064e3e8c75', '', '', 'https://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=49271')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
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ADO.NET
The designer in this CTP is an early prototype and only supports designing the “Conceptual” layer. The designer can also generate an Entity Data Model with 1:1 mappings from an existing database that you can use right away in your application while also graphically visualizing the “Conceptual” layer. Please take a look at the walkthroughs in the Overview document included with the Entity Data Model Designer prototype for more details.
https://blogs.msdn.com/adonet/archive/2006/09/27/ADONET_vNext_EDM_Designer.aspx

ADO.NET 2.0

https://msdn2.microsoft.com/en-us/data/aa937722.aspx

EDM
Generate an Entity Data Model with 1:1 mappings from an existing database that you can use right away in your application while also graphically visualizing the “Conceptual” layer. To aid brainstorming and to better understand typical developer scenarios, the ADO.NET team created an internal prototype of a designer to let developers model the ADO.NET vNext “Conceptual” layer.
https://blogs.msdn.com/adonet/archive/2006/09/27/ADONET_vNext_EDM_Designer.aspx

Entity Data Model 101
Most developers are familiar with the Object/Relational Mapping (ORM) problem: databases use the abstraction of rows in tables, but application programs use the abstraction of classes and objects. Existing ORM frameworks tend to address this mismatch by allowing programming classes to be annotated in order to relate them to the database. 
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https://blogs.msdn.com/adonet/archive/2007/01/30/entity-data-model-part-1.aspx
', 'Visual Studio pre-release product, '1ca96c96-cd2a-48b2-998f-a3fd0b98234e')
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Voir aussi

Concepts

Outil Annotation and Research Collaboration Tool (exemple d'application EDM)
Code d'application de l'outil Annotation Research Tool (exemple d'application EDM)
Association (EDM)
Type d'entité (EDM)

Autres ressources

Spécifications EDM
Schémas et spécification de mappage (Entity Framework)

Last updated on 2008-08-23