Suggestions-("Did-you-mean"-feature!).md

+[Elasticsearch Documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-suggesters.html)
+
+- Term suggester: Suggests corrections for individual terms in a search string:
+
+- Phrase suggester: Suggests corrections for phrases.
+
+## Phrase suggester
+1. Works with phrases:
+
+Query: 
+```json
+{
+    "suggest" : {
+        "text":"data minding", 
+        "phrase_suggest": 
+        { "phrase": { "field": "_content.Page.Content.Body.~" }}
+    }
+}
+```
+
+Results: 
+```json
+"suggest": {
+        "phrase_suggest": [
+            {
+                "text": "data minding",
+                "offset": 0,
+                "length": 12,
+                "options": [
+                    {
+                        "text": "data mining",
+                        "score": 0.002154175
+                    },
+                    {
+                        "text": "data missing",
+                        "score": 0.0012882735
+                    },
+                    {
+                        "text": "data manning",
+                        "score": 0.0010319541
+                    }
+                ]
+            }
+        ]
+    }
+```
+
+2. Works with individual terms too
+Query: 
+```json
+{
+    "suggest" : {
+        "text":"pyhton", 
+        "phrase_suggest": 
+        { "phrase": { "field": "_content.Page.Content.Body.~" }}
+    }
+}
+```
+Results:
+```json
+"suggest": {
+        "phrase_suggest": [
+            {
+                "text": "pyhton",
+                "offset": 0,
+                "length": 6,
+                "options": [
+                    {
+                        "text": "python",
+                        "score": 0.06817966
+                    }
+                ]
+            }
+        ]
+    }
+```
+
+### How does it work
+
+### Settings and Arguments
+
+## Building a "Did you mean"-Feature
+
+### Idea: 
+1. Using the phrase suggester on the title field and the body field
+2. Aggregating the results
+3. Return top result
+
+### Examples:
+#### Search string: **"Pahton"**
+1. Suggestions
+- Title Field: []
+- Body Field: [{'text': 'python', 'score': 0.061882425}, {'text': 'pyhton', 'score': 0.020105202}]
+2. Aggregated results: [{'text': 'python', 'score': 0.061882425}, {'text': 'pyhton', 'score': 0.020105202}]
+3. **Did you mean: "python"**
+
+#### Search string: **"data midning"**
+1. Suggestions
+- Title Field: [{'text': 'data mining', 'score': 0.012581152}]
+- Body Field: [{'text': 'data mining', 'score': 0.002154175}, {'text': 'data missing', 'score': 0.0012882735}, {'text': 'data manning', 'score': 0.0010319541}, {'text': 'data meaning', 'score': 0.0010319541}]
+2. Aggregated results: [{'text': 'data mining', 'score': 0.014735327}, {'text': 'data missing', 'score': 0.0012882735}, {'text': 'data manning', 'score': 0.0010319541}, {'text': 'data meaning', 'score': 0.0010319541}]
+3. **Did you mean: "data mining"**
+
+#### Search string: **"data midning"**
+1. Suggestions
+- Title Field: [{'text': 'data mining', 'score': 0.012581152}]
+- Body Field: [{'text': 'data mining', 'score': 0.002154175}, {'text': 'data missing', 'score': 0.0012882735}, {'text': 'data manning', 'score': 0.0010319541}, {'text': 'data meaning', 'score': 0.0010319541}]
+2. Aggregated results: [{'text': 'data mining', 'score': 0.014735327}, {'text': 'data missing', 'score': 0.0012882735}, {'text': 'data manning', 'score': 0.0010319541}, {'text': 'data meaning', 'score': 0.0010319541}]
+