Add core object PIP documentation

pages/package/pip/package_pip_core-object.md

@@ -6,4 +6,27 @@ folder: package/pip
 parent: package_pip
 ---
 
-*Content will follow soon*
+Registers `wcf\system\SingletonFactory` objects to be accessible in templates.
+
+## Components
+
+Each item is described as a `<coreobject>` element with the mandatory element `objectname`.
+
+### `<objectname>`
+
+The fully qualified class name of the class.
+
+## Example
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<data xmlns="http://www.woltlab.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.woltlab.com http://www.woltlab.com/XSD/vortex/coreObject.xsd">
+	<import>
+		<coreobject>
+			<objectname>wcf\system\example\ExampleHandler</objectname>
+		</coreobject>
+	</import>
+</data>
+```
+
+This object can be accessed in templates via `$__wcf->getExampleHandler()` (in general: the method name begins with `get` and ends with the unqualified class name).