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+# 📌 Type Aliases Documentation
+
+## What are Type Aliases?
+
+A **type alias** assigns a meaningful name to an existing type. It helps improve **code readability** and **maintainability**, especially when dealing with **complex types**.
+
+### **Example:**
+
+```python
+GridCapacity = PandasGridCapacity | PolarsGridCapacity
+```
+
+Here, `GridCapacity` is a shorthand for both Pandas and Polars grid capacities.
+
+---
+
+## **📂 Type Aliases by File**
+
+### **📁 types_.py** *(Core Type Aliases)*
+
+#### **🔹 Agnostic Types**
+
+- `AgnosticMask` → Flexible type for masks (`Any | Sequence[Any] | None`)
+- `AgnosticAgentMask` → Selection filters for agents (`Sequence[int] | int | Literal["all", "active"] | None`)
+- `AgnosticIds` → Unique agent IDs (`int | Collection[int]`)
+
+#### **🔹 Pandas Types**
+
+- `PandasMask` → Mask type for Pandas (`pd.Series | pd.DataFrame | AgnosticMask`)
+- `AgentPandasMask` → Agent-specific mask for Pandas (`AgnosticAgentMask | pd.Series | pd.DataFrame`)
+- `PandasIdsLike` → ID representations in Pandas (`AgnosticIds | pd.Series | pd.Index`)
+- `PandasGridCapacity` → Grid capacity stored in a NumPy array (`ndarray`)
+
+#### **🔹 Polars Types**
+
+- `PolarsMask` → Mask type for Polars (`pl.Expr | pl.Series | pl.DataFrame | AgnosticMask`)
+- `AgentPolarsMask` → Agent-specific mask for Polars (`AgnosticAgentMask | pl.Expr | pl.Series | pl.DataFrame | Sequence[int]`)
+- `PolarsIdsLike` → ID representations in Polars (`AgnosticIds | pl.Series`)
+- `PolarsGridCapacity` → Grid capacity using Polars expressions (`list[pl.Expr]`)
+
+#### **🔹 Generic Types**
+
+- `DataFrame` → Supports Pandas & Polars DataFrames (`pd.DataFrame | pl.DataFrame`)
+- `DataFrameInput` → Accepted DataFrame inputs (`dict[str, Any] | Sequence[Sequence] | DataFrame`)
+- `Series` → Pandas or Polars Series (`pd.Series | pl.Series`)
+- `Index` → Indexing type (`pd.Index | pl.Series`)
+- `BoolSeries` → Boolean Series representation (`pd.Series | pl.Series`)
+- `Mask` → General mask type (`PandasMask | PolarsMask`)
+- `AgentMask` → General agent mask (`AgentPandasMask | AgentPolarsMask`)
+- `IdsLike` → ID representations (`AgnosticIds | PandasIdsLike | PolarsIdsLike`)
+- `ArrayLike` → Array representation (`ndarray | Series | Sequence`)
+
+#### **🔹 Time-Related Types**
+
+- `TimeT` → Time-based values (`float | int`)
+
+#### **🔹 Space Types**
+
+- `NetworkCoordinate` → Network-based coordinate (`int | DataFrame`)
+- `GridCoordinate` → Grid-based coordinate (`int | Sequence[int] | DataFrame`)
+- `DiscreteCoordinate` → Discrete spatial coordinate (`NetworkCoordinate | GridCoordinate`)
+- `ContinousCoordinate` → Continuous spatial coordinate (`float | Sequence[float] | DataFrame`)
+- `SpaceCoordinate` → General space coordinate (`DiscreteCoordinate | ContinousCoordinate`)
+
+- `GridCapacity` → Grid storage capacity (`PandasGridCapacity | PolarsGridCapacity`)
+- `NetworkCapacity` → Network storage capacity (`DataFrame`)
+- `DiscreteSpaceCapacity` → Discrete space capacity alias (`GridCapacity | NetworkCapacity`)
+
+---
+
+### **📁 space.py**
+
+- `ESPG` → Defines an integer alias for EPSG codes in spatial reference systems (`int`)
+
+---
+
+### **📁 agents.py**
+
+#### **🔹 Agent Identifiers & Storage**
+
+- `IdsLike` → `AgnosticIds | PandasIdsLike | PolarsIdsLike`Used for identifying agents in collections
+- `AgentMask` → `AgentPandasMask | AgentPolarsMask`Used for filtering/selecting agents
+
+#### **🔹 Agent Data Representation**
+
+- `BoolSeries` → `pd.Series | pl.Series`Boolean representation of agents
+- `Series` → `pd.Series | pl.Series`Holds a Pandas or Polars Series for agent data
+- `DataFrameInput` → `dict[str, Any] | Sequence[Sequence] | DataFrame`Accepted input formats for DataFrames
+
+---
+
+### **📁 mixin.py**
+
+#### **🔹 Utility Type Aliases**
+
+- `BoolSeries` → `pd.Series | pl.Series` Used for boolean operations in mixins
+- `DataFrame` → `pd.DataFrame | pl.DataFrame`Used in mixins for defining DataFrame operations
+- `Index` → `pd.Index | pl.Series`Used for indexing operations in mixins
+- `Mask` → `PandasMask | PolarsMask`General mask type
+- `Series` → `pd.Series | pl.Series` Pandas or Polars series representation
+
+---