diff --git a/gdtf-spec.md b/gdtf-spec.md
index a637977..2dac48a 100644
--- a/gdtf-spec.md
+++ b/gdtf-spec.md
@@ -84,6 +84,10 @@ amendments) applies.
 
 - [Semantic Versioning 2.0](https://semver.org/)
 
+- IEC 60529 Degrees of protection provided by enclosures (IP Code)
+
+- IEC 60598-2-17 Luminaires - Part 2-17: Particular requirements - Luminaires for stage lighting, television and film studios (outdoor and indoor)
+
 ## Terms and definitions
 
 For the purposes of this document, the following terms and definitions
@@ -976,10 +980,12 @@ The color rendering index does not have any children.
 #### General
 
 This section defines the general properties of the device type (XML node
-`<Properties>`). The Properties Collect currently does not have any XML
-attributes. The currently defined children nodes of properties collect
-are specified in [table 28](#user-content-table-28 ).
+`<Properties>`).
+
 
+
+The currently defined children nodes of properties collect
+are specified in [table 28](#user-content-table-28 ).
 <div id="table-28">
 
 #### Table 28. *Properties Collect*
@@ -989,7 +995,8 @@ are specified in [table 28](#user-content-table-28 ).
 | [OperatingTemperature](#user-content-operatingtemperature ) | 0 or 1 | Temperature range in which the device can be operated. |
 | [Weight](#user-content-weight )                             | 0 or 1 | Weight of the device including all accessories.        |
 | [LegHeight](#user-content-legheight )                       | 0 or 1 | Height of the legs.                                    |
-
+| [IPRating](#user-content-iprating )                         | 0 or 1 | IP Rating of the device.                               |
+| [DistanceToFlammable](#user-content-distancetoflammable )   | 0 or 1 | Minimal distance from flammable materials.             |
 
 </div>
 
@@ -1051,6 +1058,43 @@ currently defined XML attributes of the LegHeight are specified in
 
 The LegHeight currently does not have any children.
 
+#### IPRating
+
+This section defines the IP Rating of the device (XML node `<IPRating>`). The
+currently defined XML attributes of the IP Rating are specified in [table
+xx](#user-content-table-xx ).
+
+<div id="table-xx">
+
+#### Table xx. *IPRating Attributes*
+
+| XML Attribute Name | Value Type                          | Description                                                            |
+|----|----|----|
+| Value              | [String](#user-content-attrtype-string ) | IP Rating of the device in the format of IEC 60529. Example: IP65  |
+
+</div>
+
+The IP Rating currently does not have any children.
+
+
+#### DistanceToFlammable
+
+This section defines information about distance from flammable materials (XML
+node `<DistanceToFlammable>`) based on surface temperature of the fixture's
+housing. The currently defined XML attributes of the Distance To Flammable are
+specified in [table xx](#user-content-table-xx ).
+
+<div id="table-xx">
+
+#### Table xx. *DistanceToFlammable Attributes*
+
+| XML Attribute Name | Value Type                          | Description                                                            |
+|----|----|----|
+| Value              |  [Float](#user-content-attrtype-float )  | Minimal distance from flammable materials of all outer surfaces of the device according to IEC 60598-2-17; Unit: meter; Default value: 0       |
+
+</div>
+
+The Distance To Flammable currently does not have any children.
 
 ## Model Collect