private void InitQuery(IEnumerable <IPrefix> prefixes)
        {
            if (_commandText == null)
            {
                _visitedComponents = new VisitedComponentCollection(_commandText = new StringBuilder(1024));
            }

            if (prefixes == null)
            {
                _commandText.Append("{ ");
            }
            else
            {
                VisitComponent(new Prefix("xsd", new Uri(Vocabularies.Xsd.BaseUri)));

                foreach (var prefix in prefixes)
                {
                    VisitComponent(prefix);
                }
            }
        }
        private void InitQuery(IEnumerable<Prefix> prefixes)
        {
            if (_commandText == null)
            {
                _visitedComponents = new VisitedComponentCollection(_commandText = new StringBuilder(1024));
            }

            if (prefixes == null)
            {
                _commandText.Append("{ ");
            }
            else
            {
                VisitComponent(new Prefix("xsd", new Uri(Vocabularies.Xsd.BaseUri)));

                foreach (Prefix prefix in prefixes)
                {
                    VisitComponent(prefix);
                }
            }
        }