diff --git a/sightingdb-format/Makefile b/sightingdb-format/Makefile
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+MMARK:=mmark -xml2 -page
+
+docs = $(wildcard *.md)
+
+all: $(docs)
+		$(MMARK) $< > $<.xml
+		xml2rfc --text $<.xml
+		xml2rfc --html $<.xml
diff --git a/sightingdb-format/raw.md b/sightingdb-format/raw.md
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+%%%
+Title = "SightingDB format"
+abbrev = "SightingDB format"
+category = "info"
+docName = "draft-tricaud-sightingdb-format"
+ipr= "trust200902"
+area = "Security"
+
+date = 2019-11-03T00:00:00Z
+
+[[author]]
+initials="S."
+surname="Tricaud"
+fullname="Sebastien Tricaud"
+abbrev="Devo Inc."
+organization = "Devo Inc."
+ [author.address]
+ email = "sebastien.tricaud@devo.com"
+ phone = "+1 866-221-2254"
+ [author.address.postal]
+ street = "150 Cambridgepark Drive"
+ city = "Cambridge, MA"
+ code = "02140"
+ country = "USA"
+%%%
+
+.# Abstract
+
+This document describes the format used by SightingDB to give automated context to a given Attribute
+by counting occurences and tracking times of observability.
+SightingDB was designed to provide to MISP a Scalable and Fast way to store and retrive Attributes.
+
+{mainmatter}
+
+# Introduction
+
+Adding context to any Attribute is the key that makes it useful. While there exist numerous ways of doing it,
+SightingDB does it by just counting.
+Whenever somebody retrieves an Attribute, this counting is provided, allowing anyone to understand wether something
+was observed few or many times.
+
+##  Conventions and Terminology
+
+The key words "**MUST**", "**MUST NOT**", "**REQUIRED**", "**SHALL**", "**SHALL NOT**",
+"**SHOULD**", "**SHOULD NOT**", "**RECOMMENDED**", "**MAY**", and "**OPTIONAL**" in this
+document are to be interpreted as described in RFC 2119 [@!RFC2119].
+
+# Format
+
+## Overview
+
+The SightingDB format is in the JSON [@!RFC8259] format. In SightingDB, a Sighting Object is composed of a single JSON object. This object contains the following fields: value, first_seen, last_seen, count, tags, ttl, frequency and manifold.
+
+### Attribute Storage
+
+The fields described previously describe an Attribute and all the required characteristics. However they are stored in a Namespace. A Namespace is similar to a path in a filesystem where the same file can be stored in multiple places.
+
+### Namespace
+
+A Namespace with multiple levels MUST be separated with the slash '/' character. There is no specification on how they are structured, since it depends on the use cases.
+
+A Namespace starting with the underscore '_' character means it is private and internal to SightingDB. There are all reserved for the engine and MUST NOT be used.
+
+Reserved namespaces are:
+_expired/<namespace>: Which contains all the attributes that expired, preserving the origin namespace
+_shadow/<namespace>: When a value is searched and does not exists, it is stored there
+_stats: Statistics
+_config: Configuration
+_all: All the Attributes in one place, used to retrieve the 'manifold' property.
+
+The Attribute Key MUST always be the last part of the Namespace.
+
+#### Sample Namespaces
+
+/Organization1/service/ipv4: Store values for ipv4 keys in /Organization1/service
+/everything/domain: Store domains in /everything
+
+### Attribute fields
+
+#### value
+
+The attribute value, used to store and retrieve information about an attribute. Note that value is not returned back in the JSON object, since it is queried, it is known.
+
+#### first_seen
+
+Time in UTC of the first time this value was captured
+
+#### last_seen
+
+Time in UTC of the last time this value was captured
+
+#### count
+
+How many time this value was written
+
+#### tags
+
+Tags follow how they are defined in MISP using the MISP Taxonomy. Each Tag is separated with the ';' character.
+
+#### ttl
+
+Time To Live, represents the expiration in seconds since the time the Attribute was created. Once it has expired, it moves in the private Namespace _expired.
+
+When an Attribute has this field set to 0, it means it is not set to expired. This is the default behavior.
+
+When an Attribute has this field set to a number greater than 0, the expiration status is computed only at retrieval time.
+
+#### frequency
+
+Frequency is the number of time an Attribute is seen in average per day. As this field can introduced latence, its implementation is OPTIONAL.
+
+#### manifold
+
+When a given Attribute Value is stored in different namespaces, the manifold field keeps track of them so it returns in how many different places this attributes exists. This is a simple counter.
+
+## SightingDB Format - One Attribute
+
+~~~~
+{
+  "value":"127.0.0.1",
+  "first_seen":1530394819,
+  "last_seen":1572933618,
+  "count":578391,
+  "tags":"",
+  "ttl":0,
+  "frequency":1185,
+  "manifold": 17
+}
+~~~~
+
+# Acknowledgements
+
+The author wish to thank all the MISP community who are supporting the creation
+of open standards in threat intelligence sharing. As well as amazing feedback gathered
+during the MISP Summit 2019 in Luxembourg, in particular with Alexandre Dulaunoy and
+Andras Iklody.
+
+{backmatter}