> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # ValueType Whether the operator expects a single value or an array ## Example Usage ```go theme={null} import ( "github.com/OpenRouterTeam/go-sdk/models/operations" ) value := operations.ValueTypeScalar // Open enum: custom values can be created with a direct type cast custom := operations.ValueType("custom_value") ``` ## Values | Name | Value | | ----------------- | ------ | | `ValueTypeScalar` | scalar | | `ValueTypeArray` | array |