我和我的团队已经用Rasa NLU来代替路易斯女士2个多月了,到目前为止,我们已经取得了很好的效果。现在,我们有大约900个条目作为实体同义词(就像我们在LUIS中使用列表实体一样)。
只有对某些话语,实体被检测为同义词,而对于大多数话语来说,它无法检测到实体同义词。为了检测同义词,我必须创建另一个简单的实体,它再次使用所有的同义词值进行手动培训,一旦意图用这个简单的实体进行训练,Rasa似乎就可以检测到这个意图的实体,它既是简单的,也是同义词的。
另一个快速的问题是,Rasa中的实体同义词是否设计为只返回一个匹配的实体(不像LUIS,后者用于返回所有匹配的实体值)?
在拉萨,除了路易斯的实体名单之外,还有什么别的办法吗?
发布于 2017-11-15 06:17:09
Rasa中的实体同义词可能会导致一些混淆。它们提供的实际功能非常简单。对于模型解析的每个实体,该实体的值将根据实体同义词列表进行检查。如果该值与实体同义词匹配,则将其替换为同义词值。
上述语句中的一个大问题是,在用同义词替换实体之前,实体必须由模型标识。
因此,把它作为一个简化的例子。以下是我的实体同义词定义:
{
"value": "New York City",
"synonyms": ["NYC", "nyc", "the big apple"]
}如果我的培训数据仅提供此示例:
{
"text": "in the center of NYC",
"intent": "search",
"entities": [
{
"start": 17,
"end": 20,
"value": "New York City",
"entity": "city"
}
]
}我的模型不太可能像我前面所说的那样,在一个像In the center of the big apple.这样的句子中检测到一个实体,如果the big apple没有被该模型解析为一个实体,那么它就不能被实体同义词替换为读纽约市。
由于这个原因,您应该在实际的培训数据的common_examples中包含更多的例子,这些实体都是标记的。一旦对实体的所有变体进行了正确的分类,然后将这些值添加到实体同义词中,它们将被替换。
[
{
"text": "in the center of NYC",
"intent": "search",
"entities": [
{
"start": 17,
"end": 20,
"value": "New York City",
"entity": "city"
}
]
},
{
"text": "in the centre of New York City",
"intent": "search",
"entities": [
{
"start": 17,
"end": 30,
"value": "New York City",
"entity": "city"
}
]
}
]我已经将一个拉请求打开到Rasa页面中,以便为此添加一个注释。
发布于 2017-12-06 07:37:39
首先,我下载了一些用于执行此操作的LUIS模型JSON,如下所示:

接下来,我编写了一个示例C#控制台应用程序,用于将转换为RASA。
这里是LUISModel模型类.
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
namespace JSONConversion.Models
{
public class LuisSchema
{
public string luis_schema_version { get; set; }
public string versionId { get; set; }
public string name { get; set; }
public string desc { get; set; }
public string culture { get; set; }
public List<Intent> intents { get; set; }
public List<entity> entities { get; set; }
public object[] composites { get; set; }
public List<Closedlist> closedLists { get; set; }
public List<string> bing_entities { get; set; }
public object[] actions { get; set; }
public List<Model_Features> model_features { get; set; }
public List<regex_Features> regex_features { get; set; }
public List<Utterance> utterances { get; set; }
}
public class regex_Features
{
public string name { get; set; }
public string pattern { get; set; }
public bool activated { get; set; }
}
public class Intent
{
public string name { get; set; }
}
public class entity
{
public string name { get; set; }
}
public class Closedlist
{
public string name { get; set; }
public List<Sublist> subLists { get; set; }
}
public class Sublist
{
public string canonicalForm { get; set; }
public List<string> list { get; set; }
}
public class Model_Features
{
public string name { get; set; }
public bool mode { get; set; }
public string words { get; set; }
public bool activated { get; set; }
}
public class Utterance
{
public string text { get; set; }
public string intent { get; set; }
[JsonProperty("entities")]
public List<Entities> Entities { get; set; }
}
public class Entities
{
[JsonProperty("entity")]
public string Entity { get; set; }
public int startPos { get; set; }
public int endPos { get; set; }
}
}这里是RASAModel模型类:
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
namespace JSONConversion.Models
{
public class RASASchema
{
public Rasa_Nlu_Data rasa_nlu_data { get; set; }
}
public class Rasa_Nlu_Data
{
public List<Entity_Synonyms> entity_synonyms { get; set; }
public List<Regex_Features> regex_features { get; set; }
public List<Common_Examples> common_examples { get; set; }
}
public class Entity_Synonyms
{
public string value { get; set; }
public List<string> synonyms { get; set; }
}
public class Common_Examples
{
public string text { get; set; }
public string intent { get; set; }
public List<Entity> entities { get; set; }
}
public class Entity
{
public string entity { get; set; }
public string value { get; set; }
public int start { get; set; }
public int end { get; set; }
}
public class Regex_Features
{
public string name { get; set; }
public string pattern { get; set; }
}
}和我编写了两个方法,解析短语部分中同义词的LUISModel模型类,并将它们添加到RASA_NLU训练对象中的common_examples对象中。
using JSONConversion.Models;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
namespace JSONConversion.Services
{
public static class JSONHelper
{
public static Task<string> ReadFromFile(string FilePath)
{
try
{
Task<string> readFromFileTask = Task.Run<string>(() =>
{
return File.ReadAllText(FilePath);
});
return readFromFileTask;
}
catch(Exception ex)
{
throw;
}
}
public static RASASchema ConvertLUISJSON(string StringifiedLUISJson)
{
try
{
LuisSchema luisSchema = JsonConvert.DeserializeObject<LuisSchema>(StringifiedLUISJson);
RASASchema rasaSchema = new RASASchema();
rasaSchema.rasa_nlu_data = new Rasa_Nlu_Data();
rasaSchema.rasa_nlu_data.common_examples = new List<Common_Examples>();
rasaSchema.rasa_nlu_data.entity_synonyms = new List<Entity_Synonyms>();
rasaSchema.rasa_nlu_data.regex_features = new List<Regex_Features>();
luisSchema.closedLists.ForEach(x =>
{
x.subLists.ForEach(y =>
{
rasaSchema.rasa_nlu_data.entity_synonyms.Add(new Entity_Synonyms()
{
value = y.canonicalForm,
synonyms = y.list
});
});
});
luisSchema.model_features.ForEach(x =>
{
rasaSchema.rasa_nlu_data.entity_synonyms.Add(new Entity_Synonyms()
{
value = x.name,
synonyms = x.words.Split(',').ToList()
});
});
luisSchema.regex_features.ForEach(x =>
{
rasaSchema.rasa_nlu_data.regex_features.Add(new Regex_Features()
{
name = x.name,
pattern = x.pattern
});
});
luisSchema.utterances.ForEach(x =>
{
Common_Examples rasaUtterances = new Common_Examples();
rasaUtterances.text = x.text;
rasaUtterances.intent = x.intent;
List<Entity> listOfRASAEntity = new List<Entity>();
x.Entities.ForEach(y =>
{
listOfRASAEntity.Add(new Entity()
{
start = y.startPos,
end = y.endPos,
entity = y.Entity,
value = x.text.Substring(y.startPos, (y.endPos - y.startPos) + 1)
});
});
rasaUtterances.entities = listOfRASAEntity;
rasaSchema.rasa_nlu_data.common_examples.Add(rasaUtterances);
});
return rasaSchema;
}
catch (Exception ex)
{
throw;
}
}
}
}和刚刚调用这些JSON转换方法来将LUIS转换为RASA模型.
using System.Text;
using JSONConversion.Services;
using System.IO;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
namespace JSONConversion
{
class Program
{
static void Main(string[] args)
{
string json = JsonConvert.SerializeObject(JSONConversion.Services.JSONHelper.ConvertLUISJSON(JSONHelper.ReadFromFile(@"C:\Users\xyz\Documents\luis.json").Result), new JsonSerializerSettings()
{
ContractResolver = new CamelCasePropertyNamesContractResolver(),
Formatting = Formatting.Indented
});
File.WriteAllText(@"C:\Users\xyz\Desktop\RASA\data\examples\RasaFormat.json", json, Encoding.UTF8);
}
}
}在获得RASA模型之后,您可以简单地将RASA训练成同义词。
https://stackoverflow.com/questions/47299882
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