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copied!<p>I stumbled upon this thread since I got the same problem. Here's the NEST code to create an index with an AsciiFolding Analyzer:</p> <pre><code>// Create the Client string indexName = "testindex"; var uri = new Uri("http://localhost:9200"); var settings = new ConnectionSettings(uri).SetDefaultIndex(indexName); var client = new ElasticClient(settings); // Create new Index Settings IndexSettings set = new IndexSettings(); // Create a Custom Analyzer ... var an = new CustomAnalyzer(); // ... based on the standard Tokenizer an.Tokenizer = "standard"; // ... with Filters from the StandardAnalyzer an.Filter = new List<string>(); an.Filter.Add("standard"); an.Filter.Add("lowercase"); an.Filter.Add("stop"); // ... just adding the additional AsciiFoldingFilter at the end an.Filter.Add("asciifolding"); // Add the Analyzer with a name set.Analysis.Analyzers.Add("nospecialchars", an); // Create the Index client.CreateIndex(indexName, set); </code></pre> <p>Now you can Map your Entity to this index (it's important to do this after you created the Index)</p> <pre><code>client.MapFromAttributes<TestEntity>(); </code></pre> <p>And here's how such an entity could look like:</p> <pre><code>[ElasticType(Name = "TestEntity", DisableAllField = true)] public class TestEntity { public TestEntity(int id, string desc) { ID = id; Description = desc; } public int ID { get; set; } [ElasticProperty(Analyzer = "nospecialchars")] public string Description { get; set; } } </code></pre> <p>There you go, the Description-Field is now inserted into the index without accents. You can test this if you check the Mapping of your index:</p> <pre><code>http://localhost:9200/testindex/_mapping </code></pre> <p>Which then should look something like:</p> <pre><code>{ testindex: { TestEntity: { _all: { enabled: false }, properties: { description: { type: "string", analyzer: "nospecialchars" }, iD: { type: "integer" } } } } } </code></pre> <p>Hope this will help someone.</p>

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