public virtual bool IsValidPartialVariableName(String value)
{
if (value.Length == 0)
{
return(false);
}
if (value[0] != '$' && value[0] != '?')
{
return(false);
}
if (value.Length == 1)
{
return(true);
}
char[] cs = value.ToCharArray(1, value.Length - 1);
//First Character must be from PN_CHARS_U or a digit
char first = cs[0];
if (Char.IsDigit(first) || SparqlSpecsHelper.IsPNCharU(first))
{
if (cs.Length > 1)
{
for (int i = 1; i < cs.Length; i++)
{
//Middle Chars must be from PN_CHARS or a '.'
if (!(cs[i] == '.' || SparqlSpecsHelper.IsPNChar(cs[i])))
{
return(false);
}
//Can't do the last character specific test because this is only a partial test
}
return(true);
}
else
{
return(true);
}
}
else
{
return(false);
}
}
