Field Configuration: Naming Convention

Please note this is not the Field Label but it is targeted towards internal name of the field.

Following is the standard convention to note while creating new fields in Hawksearch:

Only alphanumeric characters and the underscore are allowed in the fieldname
All characters are lowercase
Spaces must be replaced by underscores '_'
Underscore cannot be at the beginning or end of the name
Atleast one character is required
Atleast one number is required - an “n” will be appended to it

C# code block for your reference as below:

public static string GetStandardFieldName(string InputField)
{
    var rgx = new System.Text.RegularExpressions.Regex("[^a-zA-Z0-9_]");

    string SField = InputField;
    SField = SField.Replace(" ", "_");
    SField = rgx.Replace(SField, "");

    if (!string.IsNullOrEmpty(SField))
    {
        SField = SField.ToLower();
        if (SField.StartsWith("_"))
            SField = SField.Remove(0, 1);
        if (SField.EndsWith("_"))
            SField = SField.Remove(SField.Length - 1);
    }

    if (!string.IsNullOrEmpty(SField))
    {
        if(int.TryParse(SField.Substring(0, 1), out int result))
            SField= "n" + SField;
    }

    return SField;
}

Examples:

GetStandardFieldName("Hello, world!") 
GetStandardFieldName("99Hello, world!") 
GetStandardFieldName("_1Hello, world!_")

Outputs:

hello_world
n99hello_world
n1hello_world