diff --git a/src/LINQ/RQL/NodeMap.vb b/src/LINQ/RQL/NodeMap.vb
new file mode 100644
index 0000000..4ca62e4
--- /dev/null
+++ b/src/LINQ/RQL/NodeMap.vb
@@ -0,0 +1,10 @@
+Imports Microsoft.VisualBasic.Data.IO
+
+''' <summary>
+''' A descriptor of the specific resource file
+''' </summary>
+Public Class NodeMap
+
+    Public Property resources As List(Of String)
+
+End Class
diff --git a/src/LINQ/RQL/RQL.vbproj b/src/LINQ/RQL/RQL.vbproj
index 74da151..de58c4e 100644
--- a/src/LINQ/RQL/RQL.vbproj
+++ b/src/LINQ/RQL/RQL.vbproj
@@ -243,6 +243,8 @@
     <Import Include="System.Threading.Tasks" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="NodeMap.vb" />
+    <Compile Include="Resource.vb" />
     <Compile Include="My Project\AssemblyInfo.vb" />
     <Compile Include="My Project\Application.Designer.vb">
       <AutoGen>True</AutoGen>
@@ -287,6 +289,10 @@
       <Project>{c1413834-6eba-4668-b3e4-9dfa1edb9a5d}</Project>
       <Name>HDSPack</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\..\sciBASIC#\Data_science\Graph\graph-netcore5.vbproj">
+      <Project>{ae10f033-1ee2-44ef-af06-f1c81411d069}</Project>
+      <Name>graph-netcore5</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\..\sciBASIC#\Microsoft.VisualBasic.Core\src\Core.vbproj">
       <Project>{ef075a21-793b-45ed-9c38-ad5d04744aec}</Project>
       <Name>Core</Name>
diff --git a/src/LINQ/RQL/Resource.vb b/src/LINQ/RQL/Resource.vb
new file mode 100644
index 0000000..924ef0a
--- /dev/null
+++ b/src/LINQ/RQL/Resource.vb
@@ -0,0 +1,88 @@
+Imports System.IO
+Imports Microsoft.VisualBasic.ComponentModel.Ranges
+Imports Microsoft.VisualBasic.Data.GraphTheory
+Imports Microsoft.VisualBasic.DataStorage.HDSPack.FileSystem
+
+''' <summary>
+''' Resource query language
+''' </summary>
+Public Class Resource : Implements IDisposable
+
+    ReadOnly buf As StreamPack
+    ReadOnly index As Trie(Of NodeMap)
+
+    Private disposedValue As Boolean
+
+    Sub New(res As StreamPack)
+        buf = res
+    End Sub
+
+    Public Function Add(key As String, data As Byte()) As Boolean
+        Dim tokens As String() = Strings.LCase(key).Split
+        Dim map As String = key.MD5
+        Dim path As String = $"/pool/{map.Substring(4, 2)}/{map.Substring(16, 6)}/{map}"
+
+        For Each si As String In tokens
+            Dim v = index.Add(key)
+            Dim page As NodeMap = v.data
+
+            Call page.resources.Add(map)
+        Next
+
+        Dim file As Stream = buf.OpenFile(path, FileMode.OpenOrCreate, FileAccess.Write)
+        Call file.Write(data, Scan0, data.Length)
+        Call file.Flush()
+        Call file.Dispose()
+
+        Return True
+    End Function
+
+    Public Function [Get](query As String) As IEnumerable(Of NumericTagged(Of String))
+        Dim tokens As String() = Strings.LCase(query).Split
+        Dim maps As New Dictionary(Of String, Double)
+
+        For Each si As String In tokens
+            Dim v = index.Find(si)
+            Dim f As Double = 0.5
+
+            If v.success Then
+                f = 1
+            End If
+
+            For Each map As String In v.child.data.resources
+                maps(map) += f
+            Next
+        Next
+
+        Return From a
+               In maps
+               Select o = New NumericTagged(Of String)(a.Value, a.Key)
+               Order By o.tag Descending
+    End Function
+
+    Protected Overridable Sub Dispose(disposing As Boolean)
+        If Not disposedValue Then
+            If disposing Then
+                ' TODO: 释放托管状态(托管对象)
+                Call buf.Dispose()
+            End If
+
+            ' TODO: 释放未托管的资源(未托管的对象)并重写终结器
+            ' TODO: 将大型字段设置为 null
+            disposedValue = True
+        End If
+    End Sub
+
+    ' ' TODO: 仅当“Dispose(disposing As Boolean)”拥有用于释放未托管资源的代码时才替代终结器
+    ' Protected Overrides Sub Finalize()
+    '     ' 不要更改此代码。请将清理代码放入“Dispose(disposing As Boolean)”方法中
+    '     Dispose(disposing:=False)
+    '     MyBase.Finalize()
+    ' End Sub
+
+    Public Sub Dispose() Implements IDisposable.Dispose
+        ' 不要更改此代码。请将清理代码放入“Dispose(disposing As Boolean)”方法中
+        Dispose(disposing:=True)
+        GC.SuppressFinalize(Me)
+    End Sub
+End Class