| DisplayName | Description | ID | Type | Accessibility |
![Microsoft.Knowledge.EntityLinksToKnowledgeArticleProjection](/images/RelationshipType.png) | Entity Linked To Knowledge Article | Defines the properties of the relationship between a knowledge article and an entity | Microsoft.Knowledge.EntityLinksToKnowledgeArticleProjection | System.Entity | Public |
![Microsoft.Knowledge.MySearchProviders](/images/RelationshipType.png) | Search Providers | Defines the properties of search providers | Microsoft.Knowledge.MySearchProviders | System.User | Public |
![System.Knowledge.ArticleProjection](/images/RelationshipType.png) | Knowledge Article (advanced) | Defines the properties used in knowledge article forms | System.Knowledge.ArticleProjection | System.Knowledge.Article | Public |