diff --git a/src/wireviz/DataClasses.py b/src/wireviz/DataClasses.py
index fac6ab58..5927d734 100644
--- a/src/wireviz/DataClasses.py
+++ b/src/wireviz/DataClasses.py
@@ -21,6 +21,7 @@
 ImageScale = PlainText # = Literal['false', 'true', 'width', 'height', 'both']
 Color = PlainText # Two-letter color name = Literal[wv_colors._color_hex.keys()]
 ColorScheme = PlainText # Color scheme name = Literal[wv_colors.COLOR_CODES.keys()]
+ColorMode = PlainText # = Literal['full', 'FULL', 'hex', 'HEX', 'short', 'SHORT', 'ger', 'GER']
 
 # Type combinations
 Colors = PlainText # One or more two-letter color names (Color) concatenated into one string
@@ -30,6 +31,19 @@
 OneOrMoreWires = Union[Wire, Tuple[Wire, ...]] # One or a tuple of wires
 
 
+@dataclass
+class Metadata:
+    title: Optional[PlainText] = None
+    description: Optional[MultilineHypertext] = None
+    notes: Optional[MultilineHypertext] = None
+
+
+@dataclass
+class Options:
+    color_mode: ColorMode = 'SHORT'
+    mini_bom_mode: bool = True
+
+
 @dataclass
 class Image:
     gv_dir: InitVar[Path] # Directory of .gv file injected as context during parsing
diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index 9d83a3df..a2258688 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -4,12 +4,13 @@
 from graphviz import Graph
 from collections import Counter
 from typing import List, Union
+from dataclasses import dataclass
 from pathlib import Path
 from itertools import zip_longest
 import re
 
 from wireviz import wv_colors, __version__, APP_NAME, APP_URL
-from wireviz.DataClasses import Connector, Cable
+from wireviz.DataClasses import Metadata, Options, Connector, Cable
 from wireviz.wv_colors import get_color_hex
 from wireviz.wv_gv_html import nested_html_table, html_colorbar, html_image, \
     html_caption, remove_links, html_line_breaks
@@ -20,11 +21,12 @@
     open_file_read, open_file_write
 
 
+@dataclass
 class Harness:
+    metadata: Metadata
+    options: Options
 
-    def __init__(self):
-        self.color_mode = 'SHORT'
-        self.mini_bom_mode = True
+    def __post_init__(self):
         self.connectors = {}
         self.cables = {}
         self._bom = []  # Internal Cache for generated bom
@@ -225,7 +227,7 @@ def create_graph(self) -> Graph:
                 wireinfo = []
                 if cable.show_wirenumbers:
                     wireinfo.append(str(i))
-                colorstr = wv_colors.translate_color(connection_color, self.color_mode)
+                colorstr = wv_colors.translate_color(connection_color, self.options.color_mode)
                 if colorstr:
                     wireinfo.append(colorstr)
                 if cable.wirelabels:
@@ -361,7 +363,7 @@ def output(self, filename: (str, Path), view: bool = False, cleanup: bool = True
         with open_file_write(f'{filename}.bom.tsv') as file:
             file.write(tuplelist2tsv(bomlist))
         # HTML output
-        generate_html_output(filename, bomlist)
+        generate_html_output(filename, bomlist, self.metadata)
 
     def bom(self):
         if not self._bom:
diff --git a/src/wireviz/wireviz.py b/src/wireviz/wireviz.py
index 9ecef5a0..3c83405b 100755
--- a/src/wireviz/wireviz.py
+++ b/src/wireviz/wireviz.py
@@ -13,6 +13,7 @@
     sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
 
 from wireviz import __version__
+from wireviz.DataClasses import Metadata, Options
 from wireviz.Harness import Harness
 from wireviz.wv_helper import expand, open_file_read
 
@@ -34,7 +35,11 @@ def parse(yaml_input: str, file_out: (str, Path) = None, return_types: (None, st
 
     yaml_data = yaml.safe_load(yaml_input)
 
-    harness = Harness()
+    # Assign default metadata.title here to avoid needing file_out in Metadata.__init__().
+    harness = Harness(
+        Metadata(**{'title': Path(file_out).stem, **yaml_data.get('metadata', {})}),
+        Options(**yaml_data.get('options', {})),
+    )
 
     # add items
     sections = ['connectors', 'cables', 'connections']
diff --git a/src/wireviz/wv_bom.py b/src/wireviz/wv_bom.py
index ac5b071d..4cda4832 100644
--- a/src/wireviz/wv_bom.py
+++ b/src/wireviz/wv_bom.py
@@ -14,7 +14,7 @@ def get_additional_component_table(harness, component: Union[Connector, Cable])
         rows.append(["Additional components"])
         for extra in component.additional_components:
             qty = extra.qty * component.get_qty_multiplier(extra.qty_multiplier)
-            if harness.mini_bom_mode:
+            if harness.options.mini_bom_mode:
                 id = get_bom_index(harness, extra.description, extra.unit, extra.manufacturer, extra.mpn, extra.pn)
                 rows.append(component_table_entry(f'#{id} ({extra.type.rstrip()})', qty, extra.unit))
             else:
diff --git a/src/wireviz/wv_html.py b/src/wireviz/wv_html.py
index b328ba3d..d4b394b3 100644
--- a/src/wireviz/wv_html.py
+++ b/src/wireviz/wv_html.py
@@ -2,21 +2,26 @@
 # -*- coding: utf-8 -*-
 
 from pathlib import Path
+from typing import List, Union
 import re
 
 from wireviz import __version__, APP_NAME, APP_URL
+from wireviz.DataClasses import Metadata
 from wireviz.wv_helper import flatten2d, open_file_read, open_file_write
 
-def generate_html_output(filename: (str, Path), bom_list):
+def generate_html_output(filename: Union[str, Path], bom_list: List[List[str]], metadata: Metadata):
     with open_file_write(f'{filename}.html') as file:
         file.write('<!DOCTYPE html>\n')
         file.write('<html lang="en"><head>\n')
         file.write(' <meta charset="UTF-8">\n')
         file.write(f' <meta name="generator" content="{APP_NAME} {__version__} - {APP_URL}">\n')
-        file.write(f' <title>{APP_NAME} Diagram and BOM</title>\n')
+        file.write(f' <title>{metadata.title}</title>\n')
         file.write('</head><body style="font-family:Arial">\n')
 
-        file.write('<h1>Diagram</h1>')
+        file.write(f'<h1>{metadata.title}</h1>\n')
+        if metadata.description:
+            file.write(f'<p>{metadata.description}</p>\n')
+        file.write('<h2>Diagram</h2>\n')
         with open_file_read(f'{filename}.svg') as svg:
             file.write(re.sub(
                 '^<[?]xml [^?>]*[?]>[^<]*<!DOCTYPE [^>]*>',
@@ -25,7 +30,7 @@ def generate_html_output(filename: (str, Path), bom_list):
             for svgdata in svg:
                 file.write(svgdata)
 
-        file.write('<h1>Bill of Materials</h1>')
+        file.write('<h2>Bill of Materials</h2>\n')
         listy = flatten2d(bom_list)
         file.write('<table style="border:1px solid #000000; font-size: 14pt; border-spacing: 0px">')
         file.write('<tr>')
@@ -39,6 +44,9 @@ def generate_html_output(filename: (str, Path), bom_list):
                 align = 'text-align:right; ' if listy[0][i] == 'Qty' else ''
                 file.write(f'<td style="{align}border:1px solid #000000; padding: 4px">{item_str}</td>')
             file.write('</tr>')
-        file.write('</table>')
+        file.write('</table>\n')
+
+        if metadata.notes:
+            file.write(f'<h2>Notes</h2>\n<p>{metadata.notes}</p>\n')
 
         file.write('</body></html>')