diff --git a/content/reference/common-attributes.include.markdown b/content/reference/common-attributes.include.markdown
index 712a72f79..309623820 100644
--- a/content/reference/common-attributes.include.markdown
+++ b/content/reference/common-attributes.include.markdown
@@ -16,6 +16,8 @@ the [Promise types] page. The common attributes are as follows:
 
 #### [if][Promise types#if]
 
+#### [unless][Promise types#unless]
+
 #### [meta][Promise types#meta]
 
 #### [with][Promise types#with]
diff --git a/content/reference/promise-types/access.markdown b/content/reference/promise-types/access.markdown
index 22f583dd0..95690e8f7 100644
--- a/content/reference/promise-types/access.markdown
+++ b/content/reference/promise-types/access.markdown
@@ -111,6 +111,8 @@ promises will override less specific ones.
 
 ## Attributes
 
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
 ### admit_hostnames
 
 **Description:** A list of hostnames or domains that should have access to the object.
diff --git a/content/reference/promise-types/classes.markdown b/content/reference/promise-types/classes.markdown
index aeed83ee2..380209c9e 100644
--- a/content/reference/promise-types/classes.markdown
+++ b/content/reference/promise-types/classes.markdown
@@ -71,6 +71,8 @@ bundle agent example
 
 ## Attributes
 
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
 ### and
 
 **Description:** Combine class sources with AND
diff --git a/content/reference/promise-types/defaults.markdown b/content/reference/promise-types/defaults.markdown
index 883aa056c..865f7f7d0 100644
--- a/content/reference/promise-types/defaults.markdown
+++ b/content/reference/promise-types/defaults.markdown
@@ -88,6 +88,8 @@ reports:
 
 ## Attributes
 
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
 ### if_match_regex
 
 **Description:** If this [anchored][anchored] regular expression matches the
diff --git a/content/reference/promise-types/measurements.markdown b/content/reference/promise-types/measurements.markdown
index f0ce5bcd4..ac5b5f85c 100644
--- a/content/reference/promise-types/measurements.markdown
+++ b/content/reference/promise-types/measurements.markdown
@@ -150,6 +150,8 @@ may be used in other promises in the form `$(mon.handle)`.
 
 ## Attributes
 
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
 ### stream_type
 
 **Description:** The datatype being collected.
diff --git a/content/reference/promise-types/meta.markdown b/content/reference/promise-types/meta.markdown
index 311e7b7fe..e2f672f5f 100644
--- a/content/reference/promise-types/meta.markdown
+++ b/content/reference/promise-types/meta.markdown
@@ -26,3 +26,90 @@ reports:
 ```
 
 The value of meta data can be of the types `string` or `slist` or `data`.
+
+## Attributes
+
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
+### data
+
+**Description:** A data container structure
+
+**Type:** `data`
+
+**Allowed input range:** (arbitrary string)
+
+**Example:**
+
+```cf3
+vars:
+
+ "loaded1" data => readjson("/tmp/myfile.json", 40000);
+ "loaded2" data => parsejson('{"key":"value"}');
+ "loaded3" data => readyaml("/tmp/myfile.yaml", 40000);
+ "loaded4" data => parseyaml('- key2: value2');
+ "merged1" data => mergedata(loaded1, loaded2, loaded3, loaded4);
+
+ # JSON or YAML can be inlined since CFEngine 3.7
+ "inline1" data => '{"key":"value"}'; # JSON
+ "inline2" data => '---$(const.n)- key2: value2'; # YAML requires "---$(const.n)" header
+```
+
+### slist
+
+**Description:** A list of scalar strings
+
+**Type:** `slist`
+
+**Allowed input range:** (arbitrary string)
+
+**Example:**
+
+```cf3
+vars:
+
+ "xxx"    slist  => {  "literal1",  "literal2" };
+ "xxx1"   slist  => {  "1", @(xxx) }; # interpolated in order
+ "yyy"    slist  => {
+                    readstringlist(
+                                  "/home/mark/tmp/testlist",
+                                  "#[a-zA-Z0-9 ]*",
+                                  "[^a-zA-Z0-9]",
+                                  15,
+                                  4000
+                                  )
+                    };
+
+ "zzz"    slist  => { readstringlist(
+    "/home/mark/tmp/testlist2",
+    "#[^\n]*",
+    ",",
+    5,
+    4000)
+    };
+```
+
+**Notes:**
+
+Some [functions][Functions] return `slist`s, and an `slist`
+may contain the values copied from another `slist`, `rlist`, or `ilist`. See
+[`policy`](#policy).
+
+
+### string
+
+**Description:** A scalar string
+
+**Type:** `string`
+
+**Allowed input range:** (arbitrary string)
+
+**Example:**
+
+```cf3
+vars:
+
+ "xxx"    string => "Some literal string...";
+ "yyy"    string => readfile( "/home/mark/tmp/testfile" , "33" );
+```
+
diff --git a/content/reference/promise-types/roles.markdown b/content/reference/promise-types/roles.markdown
index c8ec639cd..3274860eb 100644
--- a/content/reference/promise-types/roles.markdown
+++ b/content/reference/promise-types/roles.markdown
@@ -37,6 +37,8 @@ classes matching the regular expression `Myclass_.*` hen using the
 
 ## Attributes
 
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
 ### authorize
 
 **Description:** List of public-key user names that are allowed to activate
diff --git a/content/reference/promise-types/vars.markdown b/content/reference/promise-types/vars.markdown
index c93fdc4af..2da3dacfb 100644
--- a/content/reference/promise-types/vars.markdown
+++ b/content/reference/promise-types/vars.markdown
@@ -302,6 +302,8 @@ vars:
 
 ## Attributes
 
+{{< CFEngine_include_markdown(common-attributes.include.markdown) >}}
+
 ### policy
 
 **Description:** The policy for (dis)allowing (re)definition of variables