Riak search schema for my bucket, it's the default and I always store JSON data.

gistfile1.txt

%% Schema for 'objects'

{
    schema, 
    [
        {version, "1.1"},
        {n_val, 3},
        {default_field, "value"},
        {analyzer_factory, {erlang, text_analyzers, whitespace_analyzer_factory}}
    ],
    [
        %% Field names ending in "_num" are indexed as integers
        {dynamic_field, [
            {name, "*_num"},
            {type, integer},
            {analyzer_factory, {erlang, text_analyzers, integer_analyzer_factory}}
        ]},

        %% Field names ending in "_int" are indexed as integers
        {dynamic_field, [
            {name, "*_int"},
            {type, integer},
            {analyzer_factory, {erlang, text_analyzers, integer_analyzer_factory}}
        ]},

        %% Field names ending in "_dt" are indexed as dates
        {dynamic_field, [
            {name, "*_dt"},
            {type, date},
            {analyzer_factory, {erlang, text_analyzers, noop_analyzer_factory}}
        ]},

        %% Field names ending in "_date" are indexed as dates
        {dynamic_field, [
            {name, "*_date"},
            {type, date},
            {analyzer_factory, {erlang, text_analyzers, noop_analyzer_factory}}
        ]},

        %% Field names ending in "_txt" are indexed as full text"
        {dynamic_field, [
            {name, "*_txt"},
            {type, string},
            {analyzer_factory, {erlang, text_analyzers, standard_analyzer_factory}}
        ]},

        %% Field names ending in "_text" are indexed as full text"
        {dynamic_field, [
            {name, "*_text"},
            {type, string},
            {analyzer_factory, {erlang, text_analyzers, standard_analyzer_factory}}
        ]},

        %% Everything else is a string
        {dynamic_field, [
            {name, "*"},
            {type, string},
            {analyzer_factory, {erlang, text_analyzers, whitespace_analyzer_factory}}
        ]}
    ]
}.