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+label: Reference
+position: 3
diff --git a/docs/workflows/reference/loaders.md b/docs/workflows/reference/loaders.md
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+# Loaders
+
+In addition to those provided by [rdf-loader-code](https://npm.im/rdf-loader-code), 
+the `barnard59-core` package provides additional loaders to simplify the definition of pipelines.
+
+## `p:Pipeline`
+
+TBD
+
+## `p:Variable(Name)`
+
+TBD
+
+## `p:FileContents`
+
+Reads file from a given path and returns its raw contents.
+
+:::note
+`p:FileContents` is a literal node
+:::
+
+:::caution
+
+This loader may not be suitable for loading large files because they are synchronously put into memory
+
+:::
+
+### Basic usage
+
+```turtle
+@prefix code: <https://code.described.at/> .
+@prefix p: <https://pipeline.described.at/> .
+
+<step>
+    code:arguments
+        (
+            "/full/path/myKeyFile.key"^^p:FileContent
+        )
+.
+```
+
+### Path in variable
+
+The `p:FileContent` literal can also be the name of a variable.
+
+```turtle
+@prefix code: <https://code.described.at/> .
+@prefix p: <https://pipeline.described.at/> .
+
+<pipeline>
+    p:variables [
+        p:variable [ p:name "KEY_PATH" ; p:value "/full/path/myKeyFile.key" ] ;
+    ] ;
+.
+
+<step>
+    code:arguments
+        (
+            "KEY_PATH"^^p:FileContent
+        )
+.
+```
+
+### Home dir paths
+
+For convenience, bash-style paths stating with `~` are also supported.
+
+```turtle
+@prefix code: <https://code.described.at/> .
+@prefix p: <https://pipeline.described.at/> .
+
+<step>
+    a p:Step ;
+    code:implementedBy
+        [
+            a code:EcmaScriptModule ;
+            code:link <node:barnard59-ftp/list.js#default> ;
+        ] ;
+    code:arguments
+        [
+            code:name "privateKey" ;
+            code:value "~/.ssh/id_ed25519"^^p:FileContent ;
+        ] ;
+.
+```