diff --git a/contrib/html/openapi.yaml b/contrib/html/openapi.yaml
index cd4eba86..a4ab246f 100644
--- a/contrib/html/openapi.yaml
+++ b/contrib/html/openapi.yaml
@@ -205,12 +205,12 @@ components:
   schemas:
     Global:
       required:
-        - lastup
+        - version
+        - signal
+        - reconnects
         - masters
         - messages
-        - reconnects
-        - signal
-        - version
+        - lastup
       type: object
       properties:
         version:
@@ -223,6 +223,12 @@ components:
           description: the result of update check ("OK" or string describing available
             updates).
           example: revision 1234abd available, 5 newer configuration files available
+        user:
+          type: string
+          description: logged in user name.
+        access:
+          type: string
+          description: access level(s) of the logged in user.
         signal:
           type: boolean
           description: whether signal is available.
@@ -237,6 +243,26 @@ components:
           type: integer
           description: the maximum symbol rate on the bus seen since start.
           example: 167
+        minarbitrationmicros:
+          minimum: 0
+          type: integer
+          description: the minimum arbitration delay in microseconds.
+          example: 4231
+        maxarbitrationmicros:
+          minimum: 0
+          type: integer
+          description: the maximum arbitration delay in microseconds.
+          example: 4892
+        minsymbollatency:
+          minimum: 0
+          type: integer
+          description: the minimum symbol latency in milliseconds.
+          example: 4
+        maxsymbollatency:
+          minimum: 0
+          type: integer
+          description: the maximum symbol latency in milliseconds.
+          example: 9
         qq:
           maximum: 255
           minimum: 0
@@ -263,6 +289,51 @@ components:
           type: integer
           description: the time in UTC seconds of the last update of any message.
           example: 1493483370
+        types:
+          type: array
+          description: the known field data types (only with definition and without since).
+          items:
+            type: object
+            properties:
+              type:
+                type: string
+                description: the type name.
+                example: UCH
+              isbits:
+                type: boolean
+                description: true when the length is in bits.
+              isadjustable:
+                type: boolean
+                description: whether the length is adjustable.
+              isignored:
+                type: boolean
+                description: whether the result is ignored.
+              length:
+                type: number
+                minimum: -1
+                maximum: 31
+                description: the field length in bytes (-1 for remainder, number
+                  of bits when isbits is true).
+              result:
+                enum:
+                  - void
+                  - string
+                  - number
+                  - date
+                  - time
+                  - datetime
+                description: the result type.
+              divisor:
+                type: number
+                description: the divisor for numeric types (only if applicable, positive
+                  for divisor, negative for reciprocal i.e. 1/-divisor).
+              precision:
+                type: number
+                description: the precision (number of fraction digits) when divisor is >1.
+            required:
+              - type
+              - isbits
+              - length
     Circuit:
       type: object
       properties:
@@ -277,14 +348,15 @@ components:
           example: 8
         messages:
           type: object
+          description: the messages with the unique key per circuit.
           additionalProperties:
             $ref: '#/components/schemas/Message'
     Message:
       required:
-        - lastup
         - name
         - passive
         - write
+        - lastup
       type: object
       properties:
         name:
@@ -296,6 +368,16 @@ components:
         write:
           type: boolean
           description: true for a write message, false for a read message.
+        level:
+          type: string
+          description: the access level for the message (only with full).
+        pollprios:
+          description: the poll priority of the message (only with full).
+          type: integer
+          minimum: 0
+        condition:
+          type: string
+          description: the condition string in case of a conditional message (only with full).
         lastup:
           minimum: 0
           type: integer
@@ -305,7 +387,7 @@ components:
           maximum: 255
           minimum: 0
           type: integer
-          description: limited source master address (only with def).
+          description: limited source master address (only with def or data).
           example: 49
         zz:
           maximum: 255
@@ -343,6 +425,9 @@ components:
           additionalProperties:
             $ref: '#/components/schemas/Field'
           description: the decoded fields the message is composed of (only if available).
+        decodeerror:
+          type: string
+          description: set to the error message instead of fields in case of a decoding error.
         fielddefs:
           type: array
           description: the field definitions the message is composed of (only with
@@ -366,11 +451,11 @@ components:
           description: the field comment (only with verbose).
     FieldDef:
       required:
-        - isbits
-        - length
         - name
         - slave
         - type
+        - isbits
+        - length
       type: object
       properties:
         name:
@@ -391,7 +476,8 @@ components:
             when isbits is true).
         divisor:
           type: number
-          description: the extra divisor applied to the raw value (only if applicable).
+          description: the divisor for numeric types (only if applicable, positive
+            for divisor, negative for reciprocal i.e. 1/-divisor).
         value:
           type: string
           description: the constant value (only if applicable).