Add basic blevex documentation

content/docs/Analyzers.md

@@ -43,9 +43,12 @@ The Detect Language Analyzer is used to examine input text, use heuristics to de
 
 ## Language Specific Analyzers
 
+There are a number of language specific analyzers available. Some of these analyzers are of experimental nature and can be found in the [blevex repository](https://github.com/blevesearch/blevex/). To learn more about the experimental code in the blevex repository and how to use it go [here]({{< relref "docs/Blevex.md" >}}).
+
 * Danish
 * Dutch
 * English
+* Japanese
 * Finnish
 * French
 * Hungarian

content/docs/Blevex.md

@@ -0,0 +1,72 @@
++++
+author = ["Silvan Jegen"]
+date = "2016-07-11T19:25:38-04:00"
+title = "Blevex"
+[menu.docs]
+weight = 1
+parent = 'analysis'
++++
+
+## The Blevex experimental repository
+
+In the blevex repository you can find code with experimental status. The repository contains the following types of code.
+
+* language specific analyzer components
+* kvstore bindings
+* language detection analyzer
+* stemmers
+
+
+### Language-specific Analyzers
+
+The following language-specific analyzers are available in blevex.
+
+* Danish
+* German
+* English
+* Spanish
+* Finnish
+* French
+* Hungarian
+* Italian
+* Japanese
+* Dutch
+* Norwegian
+* Portuguese
+* Romanian
+* Russian
+* Thai
+* Turkish
+
+In order to use them you just import the language analyzer component(s) you are interested in and use it in your CustomAnalyzer. In case you want to use the German normalize filter you have to do something like this at indexing time.
+
+Go
+```
+
+import "github.com/blevesearch/blevex/lang/de"
+
+err = indexmapping.AddCustomAnalyzer("myde",
+      map[string]interface{}{
+        "type":      custom_analyzer.Name,
+        "tokenizer": unicode.Name,
+        "token_filters": []string{
+          lower_case_filter.Name,
+          de.NormalizeName,
+        },
+      })
+
+(error handling has been left out for brevity)
+
+```
+
+Bleve will return an error if you open an index for which you haven't loaded all the necessary analyzer components. So if you want to open an index for which you have used one of the blevex analyzer components you will have to import the package (just for the side effect of having the analyzer components registered that way). To open an index built with the CustomAnalyzer above you will have to import the bleve 'de' package like this.
+
+
+Go
+```
+import _ "github.com/blevesearch/blevex/lang/de"
+
+```
+
+Afterwards you should be able to just open the index using bleve.Open().
+