/// <summary>
        /// Gets special instruction for visible text rendering, <see cref="BODYTEXT_NAME"/>
        /// </summary>
        /// <returns></returns>
        public static DocumentRenderInstruction GetBodyTextInstruction()
        {
            var output = new DocumentRenderInstruction("Body text", "", 1.0);

            output.instructionFlags = DocumentRenderInstructionFlags.cur_page | DocumentRenderInstructionFlags.page_content;
            return(output);
        }
        /// <summary>
        /// Gets the description instruction.
        /// </summary>
        /// <returns></returns>
        public static DocumentRenderInstruction GetDescriptionInstruction()
        {
            var output = new DocumentRenderInstruction("Meta description", "", 1.0);

            output.instructionFlags = DocumentRenderInstructionFlags.cur_page | DocumentRenderInstructionFlags.page_description;
            return(output);
        }
        /// <summary>
        /// Gets the title instruction.
        /// </summary>
        /// <returns></returns>
        public static DocumentRenderInstruction GetTitleInstruction()
        {
            var output = new DocumentRenderInstruction("Page title", "", 1.0);

            output.instructionFlags = DocumentRenderInstructionFlags.cur_page | DocumentRenderInstructionFlags.page_title;
            return(output);
        }