Add missing model doc pages

docs/additional-features/context-data.md

@@ -1,5 +1 @@
-# Contextual Configuration Data
-
-Sometimes it is desirable to associate arbitrary data with a group of devices to aid in their configuration. For example, you might want to associate a set of syslog servers for all devices at a particular site. Context data enables the association of arbitrary data to devices and virtual machines grouped by region, site, role, platform, and/or tenant. Context data is arranged hierarchically, so that data with a higher weight can be entered to override more general lower-weight data. Multiple instances of data are automatically merged by NetBox to present a single dictionary for each object.
-
-Devices and Virtual Machines may also have a local config context defined. This local context will always overwrite the rendered config context objects for the Device/VM. This is useful in situations were the device requires a one-off value different from the rest of the environment.
+{!docs/models/extras/configcontext.md!}

docs/models/extras/configcontext.md

@@ -0,0 +1,5 @@
+# Configuration Contexts
+
+Sometimes it is desirable to associate arbitrary data with a group of devices to aid in their configuration. For example, you might want to associate a set of syslog servers for all devices at a particular site. Context data enables the association of arbitrary data to devices and virtual machines grouped by region, site, role, platform, and/or tenant. Context data is arranged hierarchically, so that data with a higher weight can be entered to override more general lower-weight data. Multiple instances of data are automatically merged by NetBox to present a single dictionary for each object.
+
+Devices and Virtual Machines may also have a local config context defined. This local context will always overwrite the rendered config context objects for the Device/VM. This is useful in situations were the device requires a one-off value different from the rest of the environment.

docs/models/ipam/role.md

@@ -0,0 +1,3 @@
+# Prefix/VLAN Roles
+
+A role indicates the function of a prefix or VLAN. For example, you might define Data, Voice, and Security roles. Generally, a prefix will be assigned the same functional role as the VLAN to which it is assigned (if any).