@@ -105,6 +105,10 @@ ### `dict` Module
 
 {@ site/contents/reference-dict.md || 1 @}
 
+### `dstore` Module
+
+{@ site/contents/reference-dstore.md || 1 @}
+
 ### `io` Module
 
 {@ site/contents/reference-io.md || 1 @}

@@ -1,1 +1,2 @@ 
 * Added **encode-url**, **decode-url**, **parse-url** symbols.
+* Added **dstore**  module providing support for simple, persistent, in-memory JSON stores.

@@ -9,9 +9,11 @@ {{3 => [<sub>3</sub>](class:kwd)}}
 {{4 => [<sub>4</sub>](class:kwd)}}
 {{e => [dict:error](class:kwd)}}
 {{tinfo => [dict:timeinfo](class:kwd)}}
+{{dstore => [dict:datastore](class:kwd)}}
 {{d => [dict](class:kwd)}}
 {{d1 => [dict<sub>1</sub>](class:kwd)}}
 {{d2 => [dict<sub>2</sub>](class:kwd)}}
+{{s0p => [dict<sub>\*</sub>](class:kwd)}}
 {{flt => [float](class:kwd)}}
 {{i => [int](class:kwd)}}
 {{i1 => [int<sub>1</sub>](class:kwd)}}

@@ -0,0 +1,44 @@ 
+-----
+content-type: "page"
+title: "dstore Module"
+-----
+{@ _defs_.md || 0 @}
+
+{#op||dsdelete||{{datoee}} {{sl}}||{{dstore}}||
+Removes an item from the datastore {{dstore}}. The item is uniquely identified by {{sl}}, which contains the collection containing the item and the item id, separated by a forward slash (/). Puts the reference to the modified datastore back on tbe stack.
+#}
+
+{#op||dsget||{{dstore}} {{sl}}||{{d}}||
+Retrieves item {{d}} from datastore {{dstore}}. {{d}} is retrieved by specifying {{sl}}, which contains the collection containing the item and the item id, separated by a forward slash (/).
+#}
+
+{#op||dsinit||{{sl}}||{{dstore}}||
+Initializes a bew datastore by creating the {{sl}} JSON file. Puts the datastore instance on the stack. #}
+
+{#op||dspost||{{dstore}} {{sl}} {{d}}||{{dstore}}||
+Adds the dictionary {{d}} to the datastore {{dstore}} inside collection {{sl}}, generating and adding a unique **id** field to {{d}}. If the collection {{sl}} does not exist it is created. Puts the reference to the modified datastore back on tbe stack.
+#}
+
+{#op||dsput||{{dstore}} {{sl}} {{d}}||{{dstore}}||
+Adds the dictionary {{d}} to the datastore {{dstore}}. {{sl}} contains the collection where {{d}} will be placed and the id of {{d}}, separated by a forward slash (/). If the collection {{sl}} does not exist it is created. Puts the reference to the modified datastore back on tbe stack.
+#}
+
+{#op||dsquery||{{dstore}} {{sl}} {{q}}||({{d0p}})||
+> Retrieves a quotation of dictionaries from the collection {{sl}} of datastore {{dstore}} obtained by applying {{q}} as a filter to each item of the collection, picking only the elements that match the filter.
+>
+> > %sidebar%
+> > Example
+> >
+> > Assuming that **ds** is a datastore, the following program retrieves all elements of teh collection **posts** whose author field is set to "h3rald":
+> >      ds "posts" (/author "h3rald" ==) dsquery
+#}
+
+{#op||dsread||{{sl}}||{{dstore}}||
+Reads the previously-created datastore from the file {{sl}} and puts the resulting datastore instance on the stack.
+#}
+
+{#op||dswrite||{{dstore}}||{{dstore}}||
+Writes the contents of the datastore {{dstore}} to the filesystem.
+#}
+
+

@@ -14,6 +14,8 @@ {#link-module||seq#}
 : Defines operators for quotations, like map, filter, reduce, etc.
 {#link-module||dict#}
 : Defines operators for dictionaries, like dget, ddup, dset, etc.
+{#link-module||dstore#}
+: Provides support for simple, persistent, in-memory JSON stores.
 {#link-module||io#}
 : Provides operators for reading and writing files as well as printing to STDOUT and reading from STDIN.
 {#link-module||fs#}
@@ -29,7 +31,7 @@ : Provides operators to perform simple mathematical operations on integer and floating point numbers.
 {#link-module||time#}
 : Provides a few basic operators to manage dates, times, and timestamps.
 {#link-module||crypto#}
-: Provides operators to compute hashes (MD5, SHA1, SHA224, SHA256, SHA384, sha512), base64 encoding/decoding, and AES encryption/decryption.
+: Provides operators to compute hashes (MD4, MD5, SHA1, SHA224, SHA256, SHA384, sha512), base64 encoding/decoding, and AES encryption/decryption.
 {#link-module||math#}
 : Provides many mathematical operators and constants such as trigonometric functions, square root, logarithms, etc.
 {#link-module||net#}
@@ -113,6 +115,14 @@ "ipv4" :domain
        "stream" :type
        "tcp" :protocol
        ;socket
+      }
+{{dstore}}
+: A datastore dictionary that must be created through the {#link-operator||dstore||dsinit#} or {#link-operator||dstore||dsread#} operator:
+
+      {
+       {} :data
+       "path/to/file.json" :path
+       ;datastore
       }
 {{req}}
 : A request dictionary, representing an HTTP request to be performed through the operators exposed by the {#link-module||http#}: