diff --git a/refs/design/Hierarchy.md b/refs/design/Hierarchy.md
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+# Hierarchy
+
+Notes can be attached to notes creating a hierachy.
+
+The note id doesn't change based on attached parent.
diff --git a/refs/design/Icons.md b/refs/design/Icons.md
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+# Icons
+
+Assign Note some kind of Icon.
+
+This could be
+- Emoji
+- Rasterized Image
+- Font Icon
+
+Adding custom Icons.
diff --git a/refs/design/Media.md b/refs/design/Media.md
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+# Media
+
+## Research
+
+- Access to byte-Stream on Db (w/o allocating byte[])
+  https://redirect.github.com/dotnet/efcore/issues/6234#issuecomment-1153855426
+- Write to stream directly?
+  https://learn.microsoft.com/dotnet/standard/data/sqlite/blob-io
diff --git a/refs/design/Notes.md b/refs/design/Notes.md
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+# Notes
+
+Notes are plain-text content, written in MarkDown.
+
+Metadata is supported in FrontMatter.
+
+## Versions
+Note content is put verbatim in the data store.
+
+The client is responsible for building a patch that can be
+applied to the latest version of a note.
+
+The serving instance is able to produce a patch from any
+revision to the latest revision, in order for a client to
+sync up to the current state.
diff --git a/refs/design/Printing.md b/refs/design/Printing.md
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+# Printing
+
+Export to HTML/PDF.
diff --git a/refs/design/Templates.md b/refs/design/Templates.md
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+++ b/refs/design/Templates.md
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+# Templates
+
+Templates are copied to a note, making them completely editable.
+
+*Consideration*: Inherit a Template, this will make only `{{Variable}}`-formatted content blocks editable. <- Predefined Form
+
+## Metadata
+````
+---
+Template: Yes
+---
+# {{Title}}
+
+Content
+````
+
+## Built-In
+**Book** - Form
+
+Editable Text Content with default-content
+````
+---
+Template: Form
+---
+# {{Book Name}}
+
+{{Content multiline}}
+
+:::query format=list
+note.parents include this
+:::
+````
diff --git a/refs/design/UI-Desktop.md b/refs/design/UI-Desktop.md
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+# UI Desktop
+
+## Local-Mode
+Uses same data backend as Sync (Sqlite)
+
+## Online-Mode
+Performs OpenAPI calls to Sync server.
+
+*Consideration*: Allow for syncing to local backend.
+
+## Research
diff --git a/refs/design/Workspaces.md b/refs/design/Workspaces.md
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+# Workspaces
+
+On Web/Api/Sync Users can create Workspaces.
+
+Workspaces separate different "notebooks".