JP2005111711A - Printer, printing method and program for printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To print a description document in which an object such as an XHTML document is hierarchically described in a prescribed format, while analyzing more quickly. <P>SOLUTION: An analyzing section 30 stores an URL in the URL storage buffer region of a memory 50 every time when it is specified regardless of whether an XHTML document is under analysis or not. When the URL is stored in the URL storage buffer region of the memory 50, the analyzing section 30 reads in and analyzes XHTML documents being specified sequentially by the URL regardless of whether a layouter 38 is performing layout or not thus creating a DOM tree in the DOM tree storage region of the memory 50. Consequently, an XHTML document can be analyzed quickly and printed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a printing apparatus, a printing method, and a program for the printing apparatus.

Conventionally, as this type of printing apparatus, there has been proposed a printer system including a printer that analyzes and prints an SVG document and a formatting server that converts an HTML document into an SVG document (see, for example, Patent Document 1). . In this system, when an HTML document is received, the HTML document received by the formatting server is converted into an SVG document, and the converted SVG document is analyzed by a printer and printed.
JP 2002-91726 A (FIG. 1, page 5)

  However, since the above-described printer system is composed of a printer and a formatting server, the printer system is increased in size and is not suitable for installation in a limited space such as a living room. When an HTML document is received, it is converted into an SVG document by the formatting server and the converted SVG document is analyzed and printed. Therefore, it takes time for conversion and analysis, and rapid printing cannot be performed.

  An object of the printing apparatus and the printing method of the present invention is to more quickly analyze and print a description document in which objects such as an HTML document or an XHTML document obtained by extending the document are hierarchically described in a predetermined format. . An object of the program for a printing apparatus of the present invention is to cause the printing apparatus to more quickly analyze and print a description document hierarchically described in a predetermined format.

  The printing apparatus, the printing method, and the program for the printing apparatus of the present invention employ the following means in order to achieve at least a part of the above object.

The printing apparatus of the present invention includes:
A printing apparatus that analyzes a description document in which printable objects are hierarchically described in a predetermined format and prints it on a medium such as paper.
Data storage means for storing data;
When a descriptive document is specified, the specified descriptive document is received at a predetermined timing and an object in the descriptive document is received even before the print processing for the other descriptive document specified before the specification is completed. Analyzing the hierarchical tree structure and storing the analyzed tree structure in the data storage means;
When a layout creation instruction is given, a layout of objects on the medium is created for each page based on the tree structure stored in the data storage means, and the created layout for each page is stored in the data storage means. Layout creation means;
Print execution means for acquiring an object based on the layout for each page stored in the data storage means and performing layout printing when a print execution instruction is made; and
It is a summary to provide.

  In the printing apparatus of the present invention, when a descriptive document is designated, the descriptive document designated at a predetermined timing is stored even before the print processing for another descriptive document designated before the designation is completed. Since it accepts and analyzes the hierarchical tree structure of the objects in the descriptive document, it is compared to the one that starts the analysis of the specified descriptive document after the print processing of the other descriptive document specified previously is completely completed. Can be quickly analyzed and printed. Here, the description document may be described in a markup language such as XHTML language. Also, printable objects include text, images, tables and the like. As the printing apparatus, for example, a color ink jet printer can be used.

  In such a printing apparatus of the present invention, the structure analysis means is means for analyzing the specified description document with a predetermined timing as a timing when the analysis of the tree structure corresponding to the other description document is completed. You can also. In this way, it is possible to analyze the description document while the layout creating means is creating the layout. In the printing apparatus according to the aspect of the present invention, the layout creating unit is a unit that outputs a predetermined end signal to the structure analyzing unit after completing the creation of the layout, and the structure analyzing unit includes the predetermined unit. When the end signal is received, the layout generation means may be instructed to issue a layout generation instruction for the tree structure analyzed next to the tree structure related to the predetermined end signal. In this case, the layout creation means may be means for deleting the tree structure related to the creation of the layout from the data storage means after the creation of the layout is completed. In this way, a new area for storing the tree structure in the data storage means can be secured.

  In the printing apparatus according to the aspect of the invention, the structure analysis unit may store the analyzed tree structure in the data storage unit together with identification information for identifying the tree structure, and the layout generation unit may include the identification information. It is also possible to create a layout based on the tree structure specified by the identification information related to the layout creation instruction among the tree structures stored in the data storage means when the layout creation instruction is issued. it can. In this way, the tree structure can be easily identified.

  Furthermore, in the printing apparatus of the present invention, when the predetermined number of tree structures are stored in the data storage unit, the structure analysis unit specifies the designation until the tree structure stored in the data storage unit becomes less than the predetermined number. It may be a means for accepting a written description document and / or holding the analysis of the hierarchical tree structure of objects in the designated description document. In this way, the area for storing the tree structure in the data storage means can be reduced. In this case, the predetermined number may be a value of 2.

  In addition, in the printing apparatus of the present invention, the layout creating means may be a means for giving the print execution instruction to the print execution means for each page for which layout creation has been completed. It can also be a means for giving the print execution instruction to the print execution means when the creation of the layout is completed. In this way, the print execution instruction is issued when the analysis for one page is completed. Can be printed quickly.

The printing method of the present invention includes:
A printing method for analyzing a description document in which printable objects are hierarchically described in a predetermined format and printing the document on a medium such as paper.
(A) When a descriptive document is specified, the specified descriptive document is received at a predetermined timing and the description is received even before print processing for another descriptive document specified before the specification is completed. Analyzes the hierarchical tree structure of objects in a document,
(B) When a layout creation instruction is given, a layout of objects on the medium is created for each page based on the analyzed tree structure;
(C) When a print execution instruction is given, the object is to acquire an object based on the layout for each page stored in the data storage means, and to perform layout printing.

  According to the printing method of the present invention, when a descriptive document is designated, the description designated at a predetermined timing even before the print processing for another descriptive document designated before the designation is completed. Since it accepts a document and analyzes the hierarchical tree structure of objects in the description document, the analysis of the specified description document starts after the print processing of the other specified description document is completely completed. In comparison, analysis and printing can be performed quickly.

The program for the printing apparatus of the present invention is:
A program used in a printing apparatus that analyzes a description document in which printable objects are hierarchically described in a predetermined format and prints the document on a medium such as paper.
When a description document is specified, the specified description document is received at a predetermined timing even before the print processing for another description document specified before the specification ends, and the object of the description document A module to analyze the hierarchical tree structure;
A module for creating a layout of objects on the medium for each page based on the analyzed tree structure when a layout creation instruction is given;
A module that acquires an object based on the created layout for each page when a print execution instruction is given, and lays out the printable layout;
It is a summary to provide.

  According to the program for a printing apparatus of the present invention, when a descriptive document is specified by being installed in the printing apparatus, the print process for the other descriptive document specified before the specification is completed. However, since the printing device is operated to accept the description document specified at a predetermined timing and analyze the hierarchical tree structure of the objects in the description document, the print processing of the other description document specified previously is complete. As compared with a printing apparatus that starts analysis of a specified description document after the process is completed, the printing apparatus can quickly analyze and print.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a color inkjet printer 20 as an embodiment of the present invention. As shown in the figure, the color inkjet printer 20 of the embodiment is connected to a computer 10, a digital television 12, a digital camera 14, and the like, and an input interface 22 that controls input of a digital image (hereinafter referred to as an image), and an input interface 22 Analyzing an XHTML document described in XHTML (eXtensible Hyper Text Markup Language) as a markup language by assigning an output destination of data based on the format of the input image, and as an element tree structure Creates a DOM (Document Object Model) tree and reads a CSS document described by CSS (Cascading Style Sheets) to create a style object and create a memory An image and text as an element (object) described in an XHTML document using the analysis unit 30 written in the data 50 and the DOM tree and style object created by the analysis unit 30 are laid out for each print page for printing. A layouter 38 to be written in the memory 50 as a page box, a rendering plug-in (hereinafter referred to as RPI) 40 for rendering an image for printing as RBG data using a page box obtained by laying out by the layouter 38, and rendering. The RGB (Red Green Blue) data print screen is converted to CMYK (Cyan Magenta Yellow Black) data, and the converted CMYK data is binarized by image processing such as error diffusion processing. A binarization unit 44 and An image buffer 46 that temporarily stores data for outputting binarized CMYK data to a print execution unit 48 including a print head (not shown) in units of bands.

  The signal processing unit 24 outputs the data to the image buffer 46 of the print execution unit 48 when the input signal is printable data that can be printed immediately, and the print screen storage area of the memory 50 when the input signal is RGB data. In the case of a file described in an XHTML document, it is output to the analysis unit 30.

  The analysis unit 30 includes a core 32 that creates a DOM tree by instructing analysis of an XHTML document, an XML parser 34 that analyzes an XHTML document based on an instruction from the core 32, and a link tag of the created DOM tree. The CSS plug-in (hereinafter referred to as CSSI) 36 for analyzing the CSS document requested by the initialization process of FIG.

  Next, the operation of the color ink jet printer 20 of the embodiment configured as described above, particularly the operation when printing an XHTML document will be described. FIG. 2 is a flowchart illustrating an example of the analysis layout instruction process executed by the analysis unit 30. This process is repeatedly executed every predetermined time (for example, every 8 msec). When the analysis layout instruction process is executed, first, it is determined whether or not a URL (Uniform Resource Locator) for specifying an XHTML document is specified (step S100). If a URL is specified, the URL is stored in the memory. 50 is stored in the URL storage buffer area set in the area 50 (step S110), and if no URL is designated, the process proceeds to the next process. The URL designation is output to the color inkjet printer 20 from the digital television 12 when the operator selects an item to be printed by the color inkjet printer 20 among the printable items displayed on the digital television 12. Or by simply selecting a URL from the computer 10 and making a print request to the color inkjet printer 20. In the URL designation from the computer 10, the XHTML document can be analyzed, laid out, color converted, binarized, etc. by the computer 10, but the computer 10 does not perform such processing at all, and only the URL is colored. In this case, the data is transmitted to the ink jet printer 20.

  Subsequently, it is determined whether or not the URL is stored in the URL storage buffer area of the memory 50 (step S120), and whether or not the XHTML document is currently being analyzed is determined (step S130). Whether or not the XHTML document is currently being analyzed is determined by determining whether or not the analysis unit 30 is confident in parallel with the analysis layout instruction processing, for example, at the start of analysis and at the end of analysis. If so, this can be done by checking the flag. When the URL is stored and the XHTML document is not currently being analyzed, the first URL stored in the URL storage buffer area of the memory 50 is read and analysis of the XHTML document specified by the URL is started ( In step S140, when the URL is not stored or when the XHTML document is currently being analyzed even if the URL is stored, the process proceeds to the next process. The analysis of the XHTML document is performed based on the analysis process illustrated in FIG. In this analysis processing, the XHTML document specified by the URL is analyzed to create a DOM tree, the CSS document described in the XHTML document is analyzed to create a style object, and the DOM tree storage area in the memory 50 is associated with the analysis. And the style object storage area. At this time, a DOM tree ID is assigned as identification information to the DOM tree, and a style object ID is assigned to the style object as identification information. Details of the analysis processing will be described later.

  Next, it is determined whether the layout is being performed by the layouter 38 (step S150). When the layout is not performed by the layouter 38, the DOM stored in the DOM tree storage area of the memory 50 is determined. The first DOM tree in the tree is designated using the DOM tree ID, and a layout start instruction is output to the layouter 38 (step S160). This analysis layout instruction process is terminated, and the layout layout 38 is being executed. When it is in the middle, the analysis layout instruction process is terminated without outputting the layout start instruction. Here, whether or not the layout is being performed by the layouter 38 can be determined based on whether or not a layout end signal is input from the layouter 38. The reception of the layout end signal will be described in detail when the processing of the layout 38 is described.

  Since such an analysis layout instruction process is repeatedly executed as described above, every time the URL is specified in the analysis unit 30, the specified URL is stored in the memory 50 regardless of whether or not the XHTML document is being analyzed. Store in the URL storage buffer area. When a URL is stored in the URL storage buffer area of the memory 50, XHTML documents are sequentially analyzed regardless of whether the layout by the layouter 38 is being executed. Accordingly, a plurality of URLs may be stored in the URL storage buffer area of the memory 50, a plurality of DOM trees may be stored in the DOM tree storage area, and a plurality of styles may be stored in the style object storage area. An object may be stored. In the embodiment, a URL storage buffer area is set so that a plurality of URLs can be stored, and a DOM tree storage area is set so that a plurality of DOM trees can be stored. A style object storage area is set so that the style object can be stored.

  Next, analysis processing executed by the analysis unit 30 will be described. The analysis process is performed based on the flowchart illustrated in FIG. 3 as described above. For ease of explanation, a specific example will be described using the XHTML document illustrated in FIG. FIG. 5 shows an example of five images stored as the JPEG format used by the XHTML document of this specific example. When a URL is specified by the analysis layout instruction process and an analysis start instruction is given, the XHTML document specified by the URL is read (step S200), and the read XHTML document is analyzed to create a DOM tree (step S210). . At this time, a DOM tree ID (for example, an ID created by adding a DOM to a URL) is assigned as identification information to the DOM tree to be created. Specifically, the XHTML document is read by the XML parser 34 when the core 32 designates a URL and requests an analysis to the XML parser 34. Specifically, the analysis of the XHTML document and the creation of the DOM tree are performed by the XML parser 34 analyzing the XHTML document from the beginning in order to create each element and register it in the DOM tree. The element is created for the core 32, and the element is registered by associating it with the DOM tree storage area of the memory 50. FIG. 6 shows a DOM tree created by analyzing the XHTML document illustrated in FIG.

  When the DOM tree is created in this way, the CSS document designated as the XHTML document is read (step S220), and the read CSS document is analyzed to create a style object (step S230). Specifically, the CSS document 36 is read by the request in the initialization process in the link tag of the DOM tree. Specifically, the CSS document is analyzed and the style object is created by the CSSI 36 analyzing the CSS document in order from the beginning and storing each rule in the storage area for the style object in the memory 50. FIG. 7 shows an example of a CSS document designated by a specific example XHTML document, and FIG. 8 shows an example of a style object created by analyzing the CSS document.

  When the DOM tree and style object are created in this way, the created DOM tree and style object are associated with each other (step S240), and the URL to be analyzed is deleted from the URL storage buffer area (step S250). End the analysis process.

  Next, processing of the layouter 38 will be described. FIG. 9 is a flowchart illustrating an example of a layout drawing instruction process executed by the layouter 38 when the analysis unit 30 designates a DOM tree and issues a layout start instruction. When the layout drawing instruction process is executed, the layouter 38 first starts layout based on the designated DOM tree (step S300). The layout is executed by the layout process illustrated in FIG. For convenience of explanation, layout processing will be described here.

  In the layout process, the layouter 38 first creates an element box for each element of the DOM tree according to the characteristics of the element (step S400). For example, if the element is an image, an image box is created, and if the element is text, a text box is created. Subsequently, a page box corresponding to each page is created (step S410), and the element box in the body tag is laid out in order until it becomes impossible to lay out under the page box (steps S420 to S440). In the case of an image box, the element box is laid out by acquiring the image size and creating a line to register the image box. When the image box cannot be laid out due to the acquired image size, it is determined in step S430 that the layout is not possible, and a page box corresponding to the next page is created (step S410). If the element box is a text box, the layout of the element box creates a text box that fits in the line, registers it in the line, creates a line for the remaining text, and enters the created line. This is done by repeatedly creating and registering just a text box. Note that even if the text box is registered in the last line of the page, if all of the text cannot be registered, it is determined in step S430 that the layout is not possible, a page box corresponding to the next page is created, and the remaining text is similarly set. And register it in a line as a text box. FIG. 11 shows a page box of each page when laying out using a specific example DOM tree. When all the element boxes are laid out in this way, the designated DOM tree is deleted from the DOM tree storage area of the memory 50 (step S450), and the layout process is terminated. As described above, by deleting the DOM tree used when the layout process is completed from the DOM tree storage area of the memory 50, the state where the unnecessary DOM tree is stored in the DOM tree storage area is continued. Can be avoided. As a result, a storage area for a new DOM tree created by the analysis unit 30 can be secured.

  Returning to the description of the layout drawing instruction process (FIG. 9). When the layout is started, it waits for the layout of the first page to be completed (step S310), specifies the page for which the layout has been completed, and outputs a drawing start instruction to the RPI 40 (step S320). Whether or not the layout for the page has been completed can be determined based on whether or not the page box corresponding to the next page has been created and whether or not the layout processing has been completed when there is only one page. The RPI 40 instructed to start drawing executes the drawing process illustrated in FIG. 12, draws text and images as RGB data using the print image storage area of the memory 50 according to the page box (step S500), and the drawing ends. In this case, a color conversion instruction is output to the color conversion unit 42 (step S510), and a drawing end is output to the layouter 38. For image drawing, an image file is read and, depending on the file format, is developed and drawn. FIG. 13 is an explanatory diagram illustrating an example of a print result of a specific example. The broken line in the figure indicates the area of the div tag in the body tag, and “12 cm” at the top and left side of the image indicates the image size described by the CSS document. It goes without saying that the area of the div tag and the image size are not displayed in the actual print result.

  After outputting the drawing start instruction, it waits for the drawing of the page to end (step S330), and deletes the page box corresponding to the page (step S340). In this way, by deleting the page box corresponding to the page every time drawing of the page is completed, it is possible to avoid the state where unnecessary page boxes are stored in the box storage area. . When the page box is deleted in this way, it is determined whether or not there is a next page (step S350). If there is a next page, the process returns to step S310. That is, it is determined whether or not the layout for the next page has been completed. If the layout has not been completed, the process waits until the layout is completed, specifies the page for which the layout has been completed, and outputs a drawing start instruction to the RPI 40. is there. When all pages are drawn in this way and there is no next page, the end of layout is output to the analysis unit 30 (step S360), and the layout drawing instruction processing is ended. In this way, by outputting a layout end signal from the layouter 38 to the analysis unit 30, the analysis unit 30 can determine whether the layout by the layouter 38 is in progress.

  According to the color inkjet printer 20 of the embodiment described above, the specified URL is stored in the URL storage buffer area of the memory 50 regardless of whether or not the XHTML document is being analyzed every time the URL is specified. can do. Further, when the URL is stored in the URL storage buffer area of the memory 50, the XHTML document can be sequentially analyzed regardless of whether the layout is being executed by the layouter 38 or not. As a result, regardless of whether the layout is being executed by the layouter 38, the designation of the URL can be stored, and the XHTML document specified by the URL can be read and analyzed. Therefore, each time printing is completed, the XHTML document specified by the URL is read, analyzed, and printed more quickly than when it is printed.

  Here, in the color inkjet printer 20 of the embodiment, the memory 50 corresponds to the data storage means, the analysis unit 30 including the core 32, the XML parser 34, and the CSSI 36 corresponds to the structure analysis means, and the layouter 38 corresponds to the layout creation means. The RPI 40, the color conversion unit 42, the binarization unit 44, the image buffer 46, and the print execution unit 48 correspond to a print execution unit.

  In the color inkjet printer 20 of the embodiment, when the URL is stored in the URL storage buffer area of the memory 50, the XHTML document is used regardless of the number of DOM trees stored in the DOM tree storage area of the memory 50. However, when the number of DOM trees stored in the DOM tree storage area of the memory 50 is a predetermined number, the analysis of the next XHTML document may be suspended until the number becomes less than the predetermined number. For example, a value of 2 can be used as the predetermined number. In this way, the storage area for the DOM tree in the memory 50 can be reduced.

  In the color inkjet printer 20 of the embodiment, when the URL is stored in the URL storage buffer area of the memory 50, the analysis of the XHTML document is immediately performed upon completion of the analysis of the XHTML document. After the analysis is completed, the next XHTML document may be analyzed at any timing.

  In the color inkjet printer 20 of the embodiment, an XHTML document described in XHTML is analyzed and printed as a description document. However, a description document described in another markup language may be analyzed and printed. Good. In addition, a document described in a language other than the markup language may be analyzed and printed.

  In the color inkjet printer 20 of the embodiment, the computer 10, the digital television 12, the digital camera 14, and the like are described as devices connected to the input interface 22, but any device may be connected.

  In the embodiment, a color inkjet printer is used as the printing apparatus of the present invention for analyzing and printing an XHTML document. However, various printers such as a color laser printer, a monochrome inkjet printer, and a laser printer may be used.

  The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

  The present invention is applicable to the printing equipment industry.

1 is a configuration diagram illustrating a configuration of a color inkjet printer 20 according to an embodiment. The flowchart which shows an example of an analysis layout instruction | indication process. The flowchart which shows an example of an analysis process. Explanatory drawing which shows an example of the XHTML document of a specific example. Explanatory drawing which shows an example of the image described in the XHTML document of a specific example. Explanatory drawing which shows an example of the DOM tree of a specific example. Explanatory drawing which shows an example of the CSS document of a specific example. Explanatory drawing which shows an example of the style object of a specific example. 6 is a flowchart illustrating an example of a layout drawing instruction process. The flowchart which shows an example of a layout process. Explanatory drawing which shows an example of the page box of a specific example. The flowchart which shows an example of a drawing process. Explanatory drawing which shows an example of the printing result of a specific example.

Explanation of symbols

  10 computers, 12 digital televisions, 14 digital cameras, 20 color inkjet printers, 22 input interfaces, 24 signal processing units, 30 analysis units, 32 cores, 34 XML parsers, 36 CSSPIs, 38 layouters, 40 RPIs, 42 color conversion units, 44 binarization unit, 46 image buffer, 48 print execution unit.

Claims (15)

A printing apparatus that analyzes a description document in which printable objects are hierarchically described in a predetermined format and prints it on a medium such as paper.
Data storage means for storing data;
When a descriptive document is specified, the specified descriptive document is received at a predetermined timing and an object in the descriptive document is received even before the print processing for the other descriptive document specified before the specification is completed. Analyzing the hierarchical tree structure and storing the analyzed tree structure in the data storage means;
When a layout creation instruction is given, a layout of objects on the medium is created for each page based on the tree structure stored in the data storage means, and the created layout for each page is stored in the data storage means. Layout creation means;
Print execution means for acquiring an object based on the layout for each page stored in the data storage means and performing layout printing when a print execution instruction is made; and
A printing apparatus comprising:   The printing apparatus according to claim 1, wherein the structure analysis unit is a unit that analyzes the designated description document with a timing at which the analysis of the tree structure corresponding to the other description document is completed as a predetermined timing. The printing apparatus according to claim 2,
The layout creation means is means for outputting a predetermined end signal to the structure analysis means after completing the creation of the layout,
The printing apparatus according to claim 1, wherein the structure analysis unit is a unit that instructs the layout generation unit to issue a layout generation instruction for a tree structure analyzed next to the tree structure related to the predetermined end signal when the predetermined end signal is received.   The printing apparatus according to claim 3, wherein the layout creation unit is a unit that deletes the tree structure related to creation of the layout from the data storage unit after the creation of the layout is completed. The printing apparatus according to any one of claims 1 to 4,
The structure analysis means is means for storing the analyzed tree structure in the data storage means together with identification information for identifying the tree structure,
The layout creating means performs a layout based on a tree structure specified by the identification information related to the layout creation instruction among the tree structures stored in the data storage means when a layout creation instruction with the identification information is made. A printing device that is a means of creating a printer.   When the predetermined number of tree structures are stored in the data storage means, the structure analysis means accepts the specified description document until the tree structure stored in the data storage means becomes less than the predetermined number and / or 6. The printing apparatus according to claim 1, wherein the printing apparatus is means for holding analysis of a hierarchical tree structure of objects in the designated description document.   The printing apparatus according to claim 6, wherein the predetermined number is a value 2.   The printing apparatus according to claim 1, wherein the layout creation unit is a unit that gives the print execution instruction to the print execution unit for each page for which layout creation has been completed.   The printing apparatus according to claim 1, wherein the layout creation unit is a unit that issues the print execution instruction to the print execution unit when the creation of a layout for one page is completed.   The printing apparatus according to claim 1, wherein the description document is described in a markup language.   The printing apparatus according to claim 10, wherein the markup language is an XHTML language.   The printing apparatus according to claim 1, wherein the object includes at least one of a text, an image, and a table.   The printing apparatus according to claim 1, which is a color inkjet printer. A printing method for analyzing a description document in which printable objects are hierarchically described in a predetermined format and printing the document on a medium such as paper.
(A) When a descriptive document is specified, the specified descriptive document is received at a predetermined timing and the description is received even before print processing for another descriptive document specified before the specification is completed. Analyzes the hierarchical tree structure of objects in a document,
(B) When a layout creation instruction is given, a layout of objects on the medium is created for each page based on the analyzed tree structure;
(C) A printing method in which when a print execution instruction is given, an object is acquired based on the layout for each page stored in the data storage unit, and the layout is printed. A program used in a printing apparatus that analyzes a description document in which printable objects are hierarchically described in a predetermined format and prints the document on a medium such as paper.
When a description document is specified, the specified description document is received at a predetermined timing even before the print processing for another description document specified before the specification ends, and the object of the description document A module to analyze the hierarchical tree structure;
A module for creating a layout of objects on the medium for each page based on the analyzed tree structure when a layout creation instruction is given;
A module that acquires an object based on the created layout for each page when a print execution instruction is given, and lays out the printable layout;
A program comprising

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