diff --git a/src/sciline/display.py b/src/sciline/display.py
index 2f9e8498..a73d3219 100644
--- a/src/sciline/display.py
+++ b/src/sciline/display.py
@@ -1,21 +1,9 @@
 import inspect
-from dataclasses import dataclass
 from html import escape
-from itertools import chain
-from typing import Any, Literal, Mapping, Optional, Sequence, Tuple, TypeVar, Union
+from typing import Iterable, List, Tuple, TypeVar, Union
 
-from .typing import Item, Key
-from .utils import groupby, qualname
-
-ProviderKind = Literal['function', 'parameter', 'table']
-
-
-@dataclass
-class ProviderDisplayData:
-    origin: Key
-    args: Tuple[Union[Key, TypeVar], ...]
-    kind: ProviderKind
-    value: Any
+from .typing import Item, Key, Provider
+from .utils import groupby, keyname, kind_of_provider
 
 
 def _details(summary: str, body: str) -> str:
@@ -27,50 +15,65 @@ def _details(summary: str, body: str) -> str:
     '''
 
 
-def _provider_name(p: Any) -> str:
-    if isinstance(p, tuple):
-        (name, cname), values = p
-        return escape(f'{qualname(cname)}({qualname(name)})')
-    name = f'{qualname(p.origin)}'
-    if p.args:
-        args = ','.join(
-            ('*' if isinstance(arg, TypeVar) else f'{qualname(arg)}' for arg in p.args)
-        )
-        name += f'[{args}]'
-    return escape(f'{name}')
+def _provider_name(
+    p: Tuple[Key, Tuple[Union[Key, TypeVar], ...], List[Provider]]
+) -> str:
+    key, args, _ = p
+    if args:
+        # This is always the case, but mypy complains
+        if hasattr(key, '__getitem__'):
+            return escape(keyname(key[args]))
+    return escape(keyname(key))
 
 
-def _provider_source(p: Any) -> str:
-    if isinstance(p, tuple):
-        (name, cname), values = p
-        return escape(f'ParamTable({qualname(name)}, length={len(values)})')
-    if p.kind == 'function':
-        module = getattr(inspect.getmodule(p.value), '__name__', '')
+def _provider_source(
+    p: Tuple[Key, Tuple[Union[Key, TypeVar], ...], List[Provider]]
+) -> str:
+    key, _, (v, *rest) = p
+    kind = kind_of_provider(v)
+    if kind == 'table':
+        # This is always the case, but mypy complains
+        if isinstance(key, Item):
+            return escape(
+                f'ParamTable({keyname(key.label[0].tp)}, length={len((v, *rest))})'
+            )
+    if kind == 'function':
+        module = getattr(inspect.getmodule(v), '__name__', '')
         return _details(
-            escape(p.value.__name__),
-            escape(f'{module}.{p.value.__name__}'),
+            escape(v.__name__),
+            escape(f'{module}.{v.__name__}'),
         )
     return ''
 
 
-def _provider_value(p: Any) -> str:
-    if not isinstance(p, tuple) and p.kind == 'parameter':
-        html = escape(str(p.value)).strip()
+def _provider_value(
+    p: Tuple[Key, Tuple[Union[Key, TypeVar], ...], List[Provider]]
+) -> str:
+    _, _, (v, *_) = p
+    kind = kind_of_provider(v)
+    if kind == 'parameter':
+        html = escape(str(v())).strip()
         return _details(f'{html[:30]}...', html) if len(html) > 30 else html
     return ''
 
 
 def pipeline_html_repr(
-    providers: Mapping[ProviderKind, Sequence[ProviderDisplayData]]
+    providers: Iterable[Tuple[Key, Tuple[Union[Key, TypeVar], ...], Provider]]
 ) -> str:
-    def table_name_and_column_name(p: ProviderDisplayData) -> Optional[Tuple[Any, Any]]:
-        if isinstance(p.origin, Item):
-            return (p.origin.label[0].tp, p.origin.tp)
-        return None
+    def associate_table_values(
+        p: Tuple[Key, Tuple[Union[Key, TypeVar], ...], Provider]
+    ) -> Tuple[Key, Union[type, Tuple[Union[Key, TypeVar], ...]]]:
+        key, args, v = p
+        if isinstance(key, Item):
+            return (key.label[0].tp, key.tp)
+        return (key, args)
 
-    param_table_columns_by_name_colname = groupby(
-        table_name_and_column_name,
-        providers['table'],
+    providers_collected = (
+        (key, args, [value, *(v for _, _, v in rest)])
+        for ((key, args, value), *rest) in groupby(
+            associate_table_values,
+            providers,
+        ).values()
     )
     provider_rows = '\n'.join(
         (
@@ -81,11 +84,7 @@ def table_name_and_column_name(p: ProviderDisplayData) -> Optional[Tuple[Any, An
           <td scope="row">{_provider_source(p)}</th>
         </tr>'''
             for p in sorted(
-                chain(
-                    providers['function'],
-                    providers['parameter'],
-                    param_table_columns_by_name_colname.items(),
-                ),
+                providers_collected,
                 key=_provider_name,
             )
         )
diff --git a/src/sciline/pipeline.py b/src/sciline/pipeline.py
index 738ea2ec..0e82ed0b 100644
--- a/src/sciline/pipeline.py
+++ b/src/sciline/pipeline.py
@@ -26,7 +26,7 @@
 
 from sciline.task_graph import TaskGraph
 
-from .display import ProviderDisplayData, ProviderKind, pipeline_html_repr
+from .display import pipeline_html_repr
 from .domain import Scope, ScopeTwoParams
 from .handler import (
     ErrorHandler,
@@ -38,7 +38,6 @@
 from .scheduler import Scheduler
 from .series import Series
 from .typing import Graph, Item, Key, Label, Provider, get_optional, get_union
-from .utils import groupby, qualname
 
 T = TypeVar('T')
 KeyType = TypeVar('KeyType')
@@ -140,14 +139,6 @@ def provide_none() -> None:
     return None
 
 
-def _kind_of_provider(p: Callable[..., Any]) -> ProviderKind:
-    if qualname(p) == f'{qualname(Pipeline.__setitem__)}.<locals>.<lambda>':
-        return 'parameter'
-    if qualname(p) == f'{qualname(Pipeline.set_param_table)}.<locals>.<lambda>':
-        return 'table'
-    return 'function'
-
-
 class ReplicatorBase(Generic[IndexType]):
     def __init__(self, index_name: type, index: Iterable[IndexType], path: List[Key]):
         if len(path) == 0:
@@ -828,18 +819,6 @@ def _repr_html_(self) -> str:
             for origin in self._subproviders
             for args, value in self._subproviders[origin].items()
         )
-        providers = groupby(
-            lambda p: p.kind,
-            (
-                ProviderDisplayData(
-                    origin,
-                    args,
-                    kind := _kind_of_provider(value),
-                    value() if kind != 'function' else value,
-                )
-                for origin, args, value in chain(
-                    providers_with_parameters, providers_without_parameters
-                )
-            ),
+        return pipeline_html_repr(
+            chain(providers_without_parameters, providers_with_parameters)
         )
-        return pipeline_html_repr(providers)
diff --git a/src/sciline/scheduler.py b/src/sciline/scheduler.py
index 343d8962..9337c255 100644
--- a/src/sciline/scheduler.py
+++ b/src/sciline/scheduler.py
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright (c) 2023 Scipp contributors (https://github.com/scipp)
+import inspect
 from typing import Any, Callable, Dict, List, Optional, Protocol, Tuple
 
 from sciline.typing import Graph, Key
@@ -49,6 +50,9 @@ def get(self, graph: Graph, keys: List[Key]) -> Tuple[Any, ...]:
             results[t] = provider(*[results[arg] for arg in args])
         return tuple(results[key] for key in keys)
 
+    def __repr__(self) -> str:
+        return f'{self.__class__.__name__}()'
+
 
 class DaskScheduler:
     """Wrapper for a Dask scheduler.
@@ -80,3 +84,8 @@ def get(self, graph: Graph, keys: List[Key]) -> Any:
             if str(e).startswith("Cycle detected"):
                 raise CycleError from e
             raise
+
+    def __repr__(self) -> str:
+        module = getattr(inspect.getmodule(self._dask_get), '__name__', '')
+        name = self._dask_get.__name__
+        return f'{self.__class__.__name__}({module}.{name})'
diff --git a/src/sciline/task_graph.py b/src/sciline/task_graph.py
index 3e66a11e..830193b7 100644
--- a/src/sciline/task_graph.py
+++ b/src/sciline/task_graph.py
@@ -2,14 +2,62 @@
 # Copyright (c) 2023 Scipp contributors (https://github.com/scipp)
 from __future__ import annotations
 
-from typing import Any, Optional, Tuple, TypeVar, Union
+from html import escape
+from typing import Any, Optional, Sequence, Tuple, TypeVar, Union
 
 from .scheduler import DaskScheduler, NaiveScheduler, Scheduler
 from .typing import Graph, Item
+from .utils import keyname, kind_of_provider
 
 T = TypeVar("T")
 
 
+def _list_items(items: Sequence[str]) -> str:
+    return '\n'.join(
+        (
+            '<ul>',
+            ('\n'.join((f'<li>{escape(it)}</li>' for it in items))),
+            '</ul>',
+        )
+    )
+
+
+def _list_max_n_then_hide(items: Sequence[str], n: int = 5, header: str = '') -> str:
+    def wrap(s: str) -> str:
+        return '\n'.join(
+            (
+                '<div class="task-graph-detail-list">'
+                '<style> .task-graph-detail-list ul { margin-top: 0; } </style>',
+                s,
+                '</div>',
+            )
+        )
+
+    return wrap(
+        '\n'.join(
+            (
+                header,
+                _list_items(items),
+            )
+        )
+        if len(items) <= n
+        else '\n'.join(
+            (
+                '<details>',
+                '<style>',
+                'details[open] .task-graph-summary ul { display: none; }',
+                '</style>',
+                '<summary class="task-graph-summary">',
+                header,
+                _list_items((*items[:n], '...')),
+                '</summary>',
+                _list_items(items),
+                '</details>',
+            )
+        )
+    )
+
+
 class TaskGraph:
     """
     Holds a concrete task graph and keys to compute.
@@ -79,3 +127,39 @@ def visualize(
         from .visualize import to_graphviz
 
         return to_graphviz(self._graph, **kwargs)
+
+    def _repr_html_(self) -> str:
+        leafs = sorted(
+            [
+                escape(keyname(key))
+                for key in (
+                    self._keys if isinstance(self._keys, tuple) else [self._keys]
+                )
+            ]
+        )
+        roots = sorted(
+            {
+                escape(keyname(key))
+                for key, (value, _) in self._graph.items()
+                if kind_of_provider(value) != 'function'
+            }
+        )
+        scheduler = escape(str(self._scheduler))
+
+        def head(word: str) -> str:
+            return f'<h5>{word}</h5>'
+
+        return '\n'.join(
+            (
+                '<style>.task-graph-repr h5 { display: inline; }</style>',
+                '<div class="task-graph-repr">',
+                head('Output keys: '),
+                ','.join(leafs),
+                '<br>',
+                head('Scheduler: '),
+                scheduler,
+                '<br>',
+                _list_max_n_then_hide(roots, header=head('Input keys:')),
+                '</div>',
+            )
+        )
diff --git a/src/sciline/typing.py b/src/sciline/typing.py
index ac7af46e..1dcbb52d 100644
--- a/src/sciline/typing.py
+++ b/src/sciline/typing.py
@@ -6,6 +6,7 @@
     Callable,
     Dict,
     Generic,
+    Literal,
     Optional,
     Tuple,
     Type,
@@ -32,6 +33,7 @@ class Item(Generic[T]):
 
 
 Provider = Callable[..., Any]
+ProviderKind = Literal['function', 'parameter', 'table']
 
 
 Key = Union[type, Item[Any]]
diff --git a/src/sciline/utils.py b/src/sciline/utils.py
index bcd77c5b..a560595b 100644
--- a/src/sciline/utils.py
+++ b/src/sciline/utils.py
@@ -1,5 +1,7 @@
 from collections import defaultdict
-from typing import Any, Callable, DefaultDict, Iterable, TypeVar
+from typing import Any, Callable, DefaultDict, Iterable, TypeVar, Union, get_args
+
+from .typing import Item, Key, ProviderKind
 
 T = TypeVar('T')
 G = TypeVar('G')
@@ -16,3 +18,25 @@ def qualname(obj: Any) -> str:
     return str(
         obj.__qualname__ if hasattr(obj, '__qualname__') else obj.__class__.__qualname__
     )
+
+
+def keyname(key: Union[Key, TypeVar]) -> str:
+    if isinstance(key, TypeVar):
+        return str(key)
+    if isinstance(key, Item):
+        return f'{keyname(key.tp)}({keyname(key.label[0].tp)})'
+    args = get_args(key)
+    if len(args):
+        parameters = ', '.join(map(keyname, args))
+        return f'{qualname(key)}[{parameters}]'
+    return qualname(key)
+
+
+def kind_of_provider(p: Callable[..., Any]) -> ProviderKind:
+    from .pipeline import Pipeline
+
+    if qualname(p) == f'{qualname(Pipeline.__setitem__)}.<locals>.<lambda>':
+        return 'parameter'
+    if qualname(p) == f'{qualname(Pipeline.set_param_table)}.<locals>.<lambda>':
+        return 'table'
+    return 'function'