public void TestAddDomainToIndex()
        {
            const string filename            = @"Resources/PropertyDomain.nt";
            const string propertiesIndexPath = "PropertyDomain-PropertyIndex";
            const string entitiesIndexPath   = "PropertyDomain-EntitiesIndex";

            propertiesIndexPath.DeleteIfExists();
            entitiesIndexPath.DeleteIfExists();

            //Act:
            new EntitiesIndexer(filename, entitiesIndexPath).Index();
            new PropertiesIndexer(filename, propertiesIndexPath, entitiesIndexPath).Index();

            var properties = new BatchIdPropertyQuery(propertiesIndexPath, new List <string> {
                "P27", "P555", "P777"
            })
                             .Query().ToArray();

            //Assert:
            Assert.NotEmpty(properties);
            Assert.Equal(3, properties.Length);

            Assert.Equal("P555", properties[0].Id);
            Assert.Equal("P27", properties[1].Id);
            Assert.Equal("P777", properties[2].Id);

            var property555 = properties[0];
            var property27  = properties[1];
            var property777 = properties[2];

            Assert.Equal("country of citinzenship", property27.Label);
            Assert.Equal("random property 555", property555.Label);
            Assert.Equal("random property 777", property777.Label);

            Assert.NotEmpty(property27.Domain);
            Assert.Equal(5, property27.Domain.ElementAt(0));

            Assert.NotEmpty(property555.Domain);
            Assert.Equal(5, property555.Domain.ElementAt(0));
            Assert.Equal(17, property555.Domain.ElementAt(1));

            Assert.NotEmpty(property777.Domain);
            Assert.Equal(17, property777.Domain.ElementAt(0));

            propertiesIndexPath.DeleteIfExists();
            entitiesIndexPath.DeleteIfExists();
        }
        public static void AddProperties(this List <Entity> entities, string indexPath)
        {
            var propertiesIds = entities.SelectMany(x => x.Properties).Select(x => x.Id).Distinct();
            var properties    = new BatchIdPropertyQuery(indexPath, propertiesIds).GetDocuments().ToPropertiesList();

            foreach (var entity in entities)
            {
                foreach (var property in entity.Properties)
                {
                    var prop = properties.FirstOrDefault(x => x.Id.Equals(property.Id));
                    if (prop == null)
                    {
                        continue;
                    }
                    property.Label = prop.Label;
                }
            }
        }