Which NHibernate.Mapping.Attributes should I use in my class to map a dictionary?

I'm using NHibernate and I map my objects directly with attributes. I've seen similar questions but most of the case people use mapping files... or they give answers with links that don't exist anymore :) For the following class, which attributes do I have to add for the property Table which is a IDictionary? I guess it's something like [Map] but with which attributes and/or elements? Where could I find some documentation?

[Class(Table = "SpecificitySets", Name = "ZslSpecificityTable")]
public class SpecificityTable
{
    [Id(0, TypeType = typeof(ul开发者_高级运维ong), Name = "Id")]
    [Generator(1, Class = "native")]
    public uint Id 

    [Map(Name = "specificityMapping", Table = "SpecificityMapping")]
    // and then ??
    public virtual IDictionary<string, double> Table { get; private set; }

    // ...
}

after some tries it was not that difficult actually:

[Class(Table = "SpecificitySets", Name = "ZslSpecificityTable")]
public class SpecificityTable
{
    [Id(0, TypeType = typeof(ulong), Name = "Id")]
    [Generator(1, Class = "native")]
    public uint Id 

    [Map(1, Name = "Table", Table = "SpecificityMapping")]
    [Key(1, Column = "SpecTableId")]
    [Index(3, Column = "Term", Type="string")]
    [Element(4, Column = "Value", Type="double")]
    public virtual IDictionary<string, double> Table { get; private set; }

    // ...
}

1

You probably won't like the answer but... the use of NHibernate.Mapping.Attributes it not recommended.

XML files are the most flexible and documented approach, FluentNHibernate is an alternative, and ConfORM is a totally different way to look at it.