diff --git a/src/plugins/markdown-report/Makefile b/src/plugins/markdown-report/Makefile
index b1b5492f119a8c092d85976ba58f06fe3b6373aa..abecbdebfb5f4594fe78ce39d83230835db8bd34 100644
--- a/src/plugins/markdown-report/Makefile
+++ b/src/plugins/markdown-report/Makefile
@@ -3,8 +3,9 @@ ifndef FRAMAC_SHARE
 endif
 
 PLUGIN_NAME:=Report_markdown
-PLUGIN_CMO:=markdown mdr_params parse_remarks eva_coverage md_gen
+PLUGIN_CMO:=markdown sarif mdr_params parse_remarks eva_coverage md_gen
 PLUGIN_NO_TEST:=true
+PLUGIN_REQUIRES:=ppx_deriving ppx_deriving_yojson yojson
 PLUGIN_DISTRIB_EXTERNAL:=share/acsl.xml
 
 include $(FRAMAC_SHARE)/Makefile.dynamic
diff --git a/src/plugins/markdown-report/sarif.ml b/src/plugins/markdown-report/sarif.ml
new file mode 100644
index 0000000000000000000000000000000000000000..f8c4c2b3613704d835dc49a9b87f3a6c546a00b4
--- /dev/null
+++ b/src/plugins/markdown-report/sarif.ml
@@ -0,0 +1,111 @@
+(** OCaml representation for the sarif 2.0 schema. *)
+
+(** ppx_deriving_yojson generates parser and printer that are recursive
+    by default: we must thus silence spurious let rec warning (39). *)
+[@@@ warning "-39"]
+
+type uri =
+  | Sarif_github [@name "https://github.com/oasis-tcs/sarif-spec/blob/master/Schemata/sarif-schema.json"]
+[@@deriving yojson]
+
+type version =
+  | V2_0_0 [@name "2.0.0"]
+[@@deriving yojson]
+
+(* not defined yet *)
+type message = { __body: string }[@@deriving yojson]
+let no_msg = { __body = "" }
+
+type fileLocation = { __filename: string }[@@deriving yojson]
+let unknown_file = { __filename = "" }
+
+type region = { __line: int }[@@deriving yojson]
+
+type rectangle = { __minx: int; __maxx: int; __miny: int; __maxy: int }
+[@@deriving yojson]
+
+type threadFlow = { __id: int }[@@deriving yojson]
+
+type attachment = {
+ description: (message [@default no_msg ]);
+ fileLocation: fileLocation;
+ regions: (region list [@default []]);
+ rectangles: (rectangle list [@default []])
+} [@@deriving yojson]
+
+type custom_properties = [ `Null | `Assoc of (string * Yojson.Safe.json) list ]
+[@@deriving yojson]
+
+type properties = {
+  tags: string list;
+  additional_properties: (custom_properties [@default `Null])
+}
+[@@deriving yojson]
+
+let no_prop = { tags = []; additional_properties = `Null }
+
+type codeFlow = {
+  description: (message [@default no_msg]);
+  threadFlows: threadFlow list;
+  properties: (properties [@default no_prop]);
+} [@@deriving yojson]
+
+type tool = { __toolname: string }[@@deriving yojson]
+
+type invocation = { __cmdline: string list }[@@deriving yojson]
+let std_invocation = { __cmdline = [] }
+
+type conversion = {
+  tool: tool;
+  invocation: (invocation [@default std_invocation]);
+  analysisToolLogFiles: (fileLocation [@default unknown_file]);
+} [@@deriving yojson]
+
+type edge = {
+  id: string;
+  label: (message [@default no_msg]);
+  sourceNodeId: string;
+  targetNodeId: string;
+  properties: (properties [@default no_prop])
+} [@@deriving yojson]
+
+(* TODO: this type definition is unclear in the schema. *)
+type finalState = { additionalProperties: string }[@@deriving yojson]
+
+let no_state_info = { additionalProperties = "" }
+
+type edge_traversal = {
+  edgeId: string;
+  message: (message [@default no_msg]);
+  finalState: (finalState [@default no_state_info]);
+  stepOverEdgeCount: (int [@default 0]);
+  properties: (properties [@default no_prop]);
+}[@@deriving yojson]
+
+type stack = { __stack: string list }[@@deriving yojson]
+
+type sarif_exception = {
+  kind: string;
+  message: string;
+  stack: stack;
+  innerExceptions: sarif_exception list
+}[@@deriving yojson]
+
+type externalFiles = {
+  conversion: (fileLocation [@default unknown_file]);
+  files: (fileLocation [@default unknown_file]);
+  graphs: (fileLocation [@default unknown_file]);
+  invocations: (fileLocation list [@default []]);
+  logicalLocations: (fileLocation [@default unknown_file]);
+  resources: (fileLocation [@default unknown_file]);
+  results: (fileLocation [@default unknown_file]);
+}[@@deriving yojson]
+
+type run = Nothing
+[@@deriving yojson]
+
+type schema = {
+  schema: (uri [@default Sarif_github]) [@key "$schema"];
+  version: (version [@default V2_0_0]);
+  runs: run list
+} [@@deriving yojson]