JP2007179379A - Content browsing apparatus, content display device, and method of displaying content - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable contents having a plurality of pages linked together to be browsed on the same screen without losing browsing context and to introduce a versatile zooming operation. <P>SOLUTION: For a plurality of contents A, B linked together by an anchor comprising a variety of objects that can become subjects for zooming, all or part of the content B linked is embedded in the linking content A in accordance with a browser's zooming operation on the linking content A and displayed. Also, in accordance with the browser's zooming operation on the linked content B displayed while being embedded in the linking content A, its display status is varied. Thus, the contents A, B where a plurality of pages are linked together can be browsed on the same screen without the browsing context being lost, and a versatile zooming operation can be introduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a content browsing device, a content display device, and a content browsing method.

  Today, with the spread of mobile phones with cameras and digital video cameras, personal computer performance improvements, and network speedup, multimedia information such as still / moving images and audio other than text is imported into a PC (Personal Computer) and Web documents. The use, transmission / reception, and sharing in the environment are becoming common, and the amount of information is also increasing. In order for Web viewers to make effective use of the vast amount of information on these networks, it is important to be able to efficiently search for information (contents) according to their purpose of use, depending on the browsing situation and preferences It is more desirable to be able to control the amount of information displayed and the type of media used.

  When browsing content, being able to efficiently access desired information is one of the most basic requirements. For this purpose, it is important that the relationship between the outline of the entire content and the details of details is easy to understand. For example, if the contents of individual result items can be browsed simultaneously on the search result list screen, the search efficiency can be improved.

  In addition, it is required to display information flexibly in a form suitable for the purpose / preference of the viewer and the browsing situation as much as possible. For example, when viewing a business trip report, the reporter's boss would like to view the minutes of the meeting at the business trip destination, and the accounting staff would want to browse the transportation facilities and transportation costs. It is possible that the user wants to see text information with an image but only an outline of the text is desirable on the mobile terminal. In that case, it is desirable that the viewer can flexibly control the amount of text, the size of the image, the balance between the two, and the like.

  On the other hand, the basic operation interface in the current Web document environment is scroll and anchor click. By using these appropriately, you can expand large (wide area) content on a single screen, connect multiple related pages with hyperlinks, and move them with an anchor click. Improve content browsing efficiency.

  However, if the amount of information to be displayed in one page increases, even if scrolling is used, the listability will deteriorate, and conversely, if the page is subdivided and linked with a link, another page will be displayed when browsing the link destination. Will cause the browsing context to be lost. Furthermore, when the links overlap, it becomes difficult to return to the original page, and it is difficult to see how the currently focused portion is positioned in the whole.

  As described above, it is difficult in the current Web environment to flexibly control the display form according to the purpose / preference of the viewer and the browsing situation. In order to realize these in a general Web browsing environment, it is necessary to create a plurality of pages corresponding to each of these in advance, and the page configuration becomes complicated.

  Therefore, in recent years, various research and development have been conducted on ZUI (Zooming User Interface) which is an operation interface for continuously controlling the level of detail of what is displayed on the screen.

  Non-Patent Documents 1 to 3 show that when one is selected from each page or image of a document arranged two-dimensionally and zoomed in, only that is displayed in a large size while leaving the surrounding display.

  On the other hand, Non-Patent Documents 4 and 5 show that a candidate for a representation method of a target object is presented in a menu, and zoom-in is automatically performed to the extent that it can be displayed with an appropriate level of detail in the representation method selected by the user. is there.

  In addition, Non-Patent Document 6 proposes zooming from a plurality of viewpoints, and Non-Patent Document 7 proposes zooming according to the moving speed of the mouse cursor.

  According to these techniques, it is possible to simultaneously display the whole bird's-eye view and the enlarged detail in one page, which can contribute to the improvement of the browsing effect.

Perlin, K. and Fox, D .: Pad: An alternative approach to the computer interface, Proceedings of SIGGRAPH'93, pages 57--64 (1993). Bederson, B.B. and Hollan, J.D .: Pad ++: A Zooming Graphical Interface for Exploring Alternate Interface Physics, Proceedings of UIST'94, pages 17--26 (1994). Bederson, B.B., Meyer, J. and Good, L .: Jazz: An Extensible Zoomable User Interface Graphics Toolkit in Java, Proceedings of UIST'00, pages 171--180 (2000). Holmquista, L. E. and Ahlbergb, C .: Flip Zooming: A Practical Focus + Context Approach to Visualizing Large Data Sets, Proc. HCI International '97, pages 763--766 (1997). Woodruff, A., Landay, J. and Stonebraker, M .: Goal-Directed Zoom, Proceedings of CHI'98, pages 305--306 (1998). Sarkar, M., Snibbe, S.S., Tversky, O.J. and Reiss, S.P., M .: Stretching the Rubber Sheet: A Metaphor for Viewing Large Layouts on Small Screens, Proceedings of UIST'93, pages 81--91 (1993). Igarashi, T and Hinckley, K .: Speed-dependent Automatic Zooming for Efficient Document Navigation, WISS 2000, pages (2000).

  However, the above-described technology is basically developed in such a way that a zooming function is provided on the application side that displays content. For example, if you zoom in on the upper text semantically, the lower detailed text will appear, or if you want to control the display balance between the text and images that are related to each other, the content that is the target of the zoom operation The zoom behavior program had to be built in the application in advance, including the structure information. For this reason, it is generally impossible to zoom in any content other than the content having the structure assumed by the application. Therefore, these are unsuitable for the purpose of performing a general zoom operation on a Web environment including contents having various structures.

  In addition, since existing HTML (Hyper Text Markup Language) content links multiple pages with links by anchor clicks, even if the proposed method is applied to existing content as it is, another page in the original HTML is used. When browsing the information (object) in the above, the conventional anchor click must be used, and the effect of zooming is greatly impaired.

  The present invention has been made in view of the above, and allows content on which a plurality of pages are linked with each other to be browsed on the same screen without losing the browsing context, and is capable of general-purpose zooming. It is an object of the present invention to provide a content browsing device, a content display device, and a content browsing method capable of introducing an operation.

  In order to solve the above-described problems and achieve the object, the content browsing device according to the first aspect of the present invention relates to a plurality of contents that are composed of various objects that can be zoomed and are linked to each other by anchors. In accordance with the zoom operation of the viewer with respect to the link source content, all or part of the link destination content is embedded in the link source content and is displayed embedded in the link source content. The display state is changed according to the viewer's zoom operation on the linked content.

  According to a second aspect of the present invention, there is provided a content display apparatus comprising: a structure description relating to a display mode of content composed of various objects that can be zoomed; and a zooming description describing a zoom operation / behavior for each object. In the content display device that creates and displays content based on the zooming description, the zooming description includes zooming the object that is the zoom target of the content that is linked to the content that is linked to the structure description. In conjunction with this, it is possible to describe zoom propagation between objects such that the object to be zoomed of the linked content is zoomed in a state where the object is embedded in the linked content.

  According to a third aspect of the present invention, in the content display device according to the second aspect, the zooming description distinguishes the object to be zoomed from the object not to be zoomed.

  According to a fourth aspect of the present invention, in the content display device according to the second aspect, the zooming description is configured independently of the structure description.

  According to a fifth aspect of the present invention, in the content display device according to any one of the second to fourth aspects, zoom propagation for all or part of the linked content can be described in the zooming description. .

  According to a sixth aspect of the present invention, in the content display device according to any one of the second to fifth aspects, the zooming description represents a zoom level of the object that is a zoom target of the content of the link source. Only when the parameter satisfies a predetermined condition, it is possible to describe such that zoom propagation is performed for the object that is the zoom target of the linked content.

  Further, the invention according to claim 7 is the content display device according to claim 6, wherein the link destination only when the zoom rate for the object to be zoomed of the link source content is equal to or greater than a predetermined lower limit value. It is possible to describe such that zoom propagation is performed for the object that is the zoom target of the content.

  The invention according to claim 8 is the content display device according to claim 6, wherein the link destination only when the zoom rate for the object to be zoomed of the link source content is equal to or less than a predetermined upper limit value. It is possible to describe such that zoom propagation is performed for the object that is the zoom target of the content.

  The content browsing method of the invention according to claim 9 is the zoom operation of the viewer with respect to the link source content for a plurality of content composed of various objects that can be zoomed and linked to each other by an anchor. In accordance with a viewer's zoom operation on the linked content displayed in a manner embedded in the linked content and displayed. The display state is changed.

  According to the first aspect of the present invention, it is possible to browse on the same screen without losing the browsing context for content in which a plurality of pages are linked by links, and to introduce a general-purpose zooming operation. There is an effect that can be.

  In addition, according to the invention of claim 2, it is possible to view content on which a plurality of pages are linked by the same screen without losing the browsing context, and introduce a general zooming operation. There is an effect that can be done.

  According to the third aspect of the invention, there is an effect that the description of the zoom operation / behavior only needs to be an object to be zoomed.

  According to the fourth aspect of the present invention, it is possible to introduce a zoom operation including existing content, and to increase the applicability to a general-purpose Web document environment. Further, by appropriately replacing the zoom description language (ZDL), it is possible to display in accordance with the browsing situation and the viewer's preference.

  Moreover, according to the invention concerning Claim 5, there exists an effect that general purpose zooming operation can be introduce | transduced.

  According to the sixth aspect of the present invention, in zoom propagation, zoom propagation is performed only when the zoom factor of the propagation source is in a predesignated range. It can be set, and there is an effect that more flexible control can be performed.

  According to the seventh aspect of the present invention, in zoom propagation, zoom propagation is performed only when the zoom factor of the propagation source is equal to or greater than a predetermined lower limit value. Therefore, content creation can be performed when zoom propagation is desired or not desired. Can be set by the person, and there is an effect that more flexible control can be performed.

  According to the invention of claim 8, in zoom propagation, zoom propagation is performed only when the zoom factor of the propagation source is equal to or lower than a predetermined upper limit value. Can be set by the person, and there is an effect that more flexible control can be performed.

  In addition, according to the invention according to claim 9, it is possible to view the content in which a plurality of pages are linked by the link without losing the browsing context, and introduce a general zooming operation. There is an effect that can be done.

  Exemplary embodiments of a content browsing device, a content display device, and a content browsing method according to the present invention are explained in detail below with reference to the accompanying drawings.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing a system construction example of a content browsing system 100 according to the present embodiment. The content browsing system 100 according to the present embodiment assumes a server client system in which a plurality of client computers (clients) C are connected to a server computer (content server) S via a network N such as a LAN (Local Area Network). . The server computer S is a computer that performs a service for the client computer C, and the client computer C is a computer that is operated by a user to receive the service. Such server computer S and client computer C are general personal computers.

  FIG. 2 is a hardware configuration diagram of a general or standard personal computer 1. A personal computer (hereinafter abbreviated as a computer) 1 includes a central processing unit (CPU) 2 that performs information processing, a read only memory (ROM) 3 that stores a basic input output system (BIOS), and the like. A primary storage device such as a RAM (Random Access Memory) 4 that is temporarily stored in the memory, a secondary storage device such as a HDD (Hard Disk Drive) 5 that is a storage unit that stores application programs, processing results, and the like. Connected to a drive 6a of a removable medium 6 which is a storage medium for storing or distributing outside or obtaining information (application program etc.) from the outside, and a network N for communicating with other external computers 1 ',. Network interface 8 and a display that is a display unit for displaying a process progress, a process result, and the like to the user When the operator is composed of an input unit such as a keyboard 10 and a mouse 11 for inputting instructions and information to the computer 1, the data communication between the bus controller 12 is operating in the arbitration.

  The removable medium 6 includes a magnetic storage medium such as a flexible disk, a hard disk, and a magnetic tape, a magneto-optical storage medium such as an MO, a CD, a CD-ROM, a CD-R, a CD-RW, Various storage media such as optical storage media such as DVD-ROM, DVD-R, DVD-RAM, DVD-RW, DVD + RW, and semiconductor memory can be applied.

  In data transmission, data is sent to the network interface 8 of the computer 1, so that the network interface 8 outputs a signal to the network N. Further, regarding the signal received by the network interface 8, it is determined whether or not it is necessary in the network interface 8, and processing such as fetching if necessary data and discarding if unnecessary is performed. That is, all data transmission / reception is performed via the network interface 8.

  In general, when the user turns on the power of the computer 1, the CPU 2 activates a program called a loader included in the BIOS in the ROM 3, and the hardware and software of the computer 1 called the operating system (OS) from the HDD 5. Is loaded into the RAM 4. When the OS is activated, it supports activation of application programs, reading of information, storage, and the like according to user operations. As typical OS, Windows (registered trademark of Microsoft Corporation), UNIX (registered trademark of X / Open, Inc.) and the like are known. Programs that run on these OSs are called application programs. The application program is not limited to one that runs on a predetermined OS, and may be one that causes the OS to execute some of the various processes described below, or constitutes predetermined application software, an OS, or the like. It may be included as part of a group of program files.

  In general, an application program installed in the HDD 5 of the computer 1 is recorded in the removable medium 6, and the application program recorded in the removable medium 6 is installed in the HDD 5. For this reason, the removable medium 6 can also be a storage medium for storing application programs. Furthermore, the application program may be taken in from the outside via, for example, the network interface 8 and installed in the HDD 5.

  In the computer 1 (server computer S and client computer C), when an application program operating on the OS is started, the CPU 2 executes various arithmetic processes according to the application program and centrally controls each unit.

  Next, characteristic processing of the present embodiment among various types of arithmetic processing executed by the CPU 2 of the computer 1 (the server computer S and the client computer C) will be described below. Schematically, the characteristic processing of this embodiment is that in multimedia content (reports, minutes, memos, etc.), if you zoom in from the initial screen of text only, more detailed text information and conference participants It allows users to browse photos / moving images / sounds of the discussion situation.

  The server computer S (computer 1) stores a content display program in the HDD 5 as an application program. That is, the server computer S functions as a content display device, and when a content display program operating on the OS is activated, the CPU 2 controls each unit and executes content display processing according to the content display program.

  On the other hand, the client computer C (computer 1) stores a content browsing program in the HDD 5 as an application program. That is, the client computer C functions as a content browsing device, and when a content browsing program operating on the OS is activated, the CPU 2 controls each unit and executes content browsing processing according to the content browsing program.

  FIG. 3 is a block diagram showing a functional configuration relating to content display processing of the server computer S and content browsing processing of the client computer C. As shown in FIG. 3, the server computer S realizes a zoom target storage unit 21 and a content storage unit 22 by the CPU 2 following a content display program operating on the OS. On the other hand, the client computer C realizes the operation acquisition unit 31 and the display control unit 32 by the CPU 2 following a content browsing program operating on the OS.

  First, content display processing in the server computer S will be described.

  The zoom target storage means 21 is a means for storing a media object (text, still image, moving image, audio, etc.) composed of a single medium that can be a zoom target by configuring multimedia content indicating the contents of information. For example, it is stored in the HDD 5. This media object (text, still image, moving image, sound, etc.) is a zoom target that is a unit of zooming operation constituting the content.

The content storage means 22 is a means for storing a display description (structure description and zooming description) having the following characteristics (a to h) of multimedia contents, and is stored in, for example, the HDD 5. The zooming description is described in an XML (Extensible Markup Language) based zooming description language (ZDL).
a. A zoom operation / behavior to be zoomed can be described independently of the content structure.
b. A zoom operation / behavior can be described for each object constituting the content.
c. It is possible to distinguish between an object to be zoomed and a portion that is not.
d. It is possible to describe changes in detail of objects and media transitions.
e. Zoom propagation between associated objects can be described.
f. Can be described as a template.

  The basic structure of the description language for realizing these requirements is as follows.

1. Zooming operation in units of “zoom target” “Zoom target” is a unit that is a target of zoom operation, and is composed of “media objects” of text, still images, moving images, and audio that constitute content. The <template /> tag represents a zoom target template. The name attribute represents the name of the template, and the match attribute represents the reference position in the content structure description of the media object included therein. A media object is represented by <text />, <video />, or the like. The select attribute specifies a relative position from the reference position specified by the match attribute to each media object. The viewer designates a desired zoom target and performs a zoom operation (for example, the designation is performed by matching the mouse cursor with the target zoom target), but a specific designation method is not particularly mentioned in the description language.

2. Control of Zoom Level by “Zoom Ratio” “Zoom ratio” is a value representing the zoom level of each zoom target, and takes a value from 0.0 to 1.0 continuously. This “zoom rate” is specified by the ZoomFactor attribute. The <dispText>, <dispImg>, <dispVideo>, and <dispAudio> tags describe the display state of each media object with respect to the zoom rate (details will be described later). As a result, it is possible to describe the level of detail change and media transition of the media object (see the example described later). Also, the initZoomFactor attribute in the <template /> tag is the initial zoom factor when content is first displayed. Although the zoom rate is determined by the operation performed by the viewer on the zoom target (for example, the movement distance of the mouse is associated with the zoom rate), the specific operation method is not particularly described in the description language.

3. "Zoom propagation" between associated zoom targets
“Zoom propagation” refers to zooming in conjunction with another zoom target when zooming a certain zoom target (for example, zooming a zoom target at a higher level also zooms at a lower level at the same time). In zoom propagation, the zoom rate of the propagation destination is calculated from the zoom factor of the propagation source zoom target based on a predetermined “zoom propagation rate”, and the display state of the propagation destination zoom target is controlled. The zoom propagation rate is a value that represents the ratio of the change rate of the zoom rate at the propagation source and the propagation destination (when the zoom propagation rate is 0.8, the propagation destination is changed by 0.4 when the propagation source zoom rate changes by 0.5). Describe this behavior with the <propagation /> tag. The destination attribute indicates the template name of the propagation destination zoom target, and the select attribute indicates the position in the structure description of the media object included in the propagation destination zoom target. The relation attribute represents the ratio of the change rate of the zoom ratio of the propagation source and the propagation target zoom target. For example, when the zoom propagation rate is 0.8, the propagation destination is changed by 0.4 when the propagation source zoom rate is changed by 0.5. When the zoom propagation rate is -0.5, the propagation destination is changed by -0.3 when the propagation source is changed by 0.6.

4). Correspondence between structure description and zoom operation / behavior description using XPath
The match attribute in the <template /> tag, the <text />, <video />, the select attribute in the tag, and the attribute value of the select attribute in the <propagation /> tag are all relevant in the structure description. It is described by XPath. Here, XPath (XML Path Language) defines a syntax indicating a specific part of the XML document.

5. Display state of media object Each text, still image, moving image, and audio is represented by <dispText>, <dispImg>, <dispVideo>, and <dispAudio> tags. Specify the zoom factor with the zoomFactor attribute.
Text examples
<dispText zoomFactor = “0.5” fontSize = “10pt” />
(Meaning) Displayed with a zoom factor of 0.5 and a font size of 10 points.
・ Example of still image
<dispImg zoomFactor = “0.2” imgSize = “10%” />
(Meaning) Display at 10% of the maximum size at a zoom factor of 0.2.
・ Example of video
<dispVideo zoomFactor = “0.7” start = “0” end = “300” videoSize = “50%” />
(Meaning) Display at 50% of the maximum size from the 0th frame to the 300th frame at a zoom ratio of 0.7.
・ Audio example
<dispAudio zoomFactor = “0.4” start = “0s” end = “30s” />
(Meaning) Plays up to 30 seconds from the beginning at a zoom factor of 0.4.

  According to the zooming description as described above, when one media object (text, still image, moving image, audio, etc.) is zoomed, other media objects (text, still image, moving image, audio, etc.) are linked with it. Since it is possible to describe zoom propagation between zooming objects to be zoomed, natural zooming from one zoom object to another zoom object can be performed.

  Here, the browsing operation in the Web environment, the behavior of the content, and the intention of the content creator are considered. With regard to the scroll operation, there is little opportunity or necessity for the content creator to reflect any intention, and the viewer performs scrolling mainly depending on the size of the viewer. On the other hand, regarding anchor clicks, the content creator describes the object to be clicked (anchor represented by a character string, an image, etc.) and the URL of the link destination with a clear intention. There is no need to describe.

  Next, consider the zoom operation. Regarding zoom operations, there is nothing to be specified by the creator as long as the entire content screen is simply zoomed in / out, but in order to achieve fine zoom operations, It is necessary for the content creator to explicitly and intentionally describe how to change the level of detail and display media according to the zoom operation. This is the significance of describing zoom operations and behaviors on the content side.

  In other words, the creator describes the zoom operation / behavior reflecting the structure of the content on the content side, so that, unlike conventional ZUI (Zooming User Interfaces), the content can be zoomed for various contents in the Web environment. The operation can be applied, and the viewer side can also finely control the selection of the zoom target and the control of the display state.

  Therefore, in the present embodiment, a new Web document model is proposed in which an operation / behavior description is added to the conventional content structure description and style description, and a zooming description language (ZDL) is used as an example of the operation / behavior description. ) To associate continuous browsing operations. As a result, as shown in FIG. 4, for example, the structure, style, and operation / behavior can be described independently by a combination of XML + XSL + ZDL.

  By introducing such a Web document model, it is possible to introduce a zoom operation including existing content, and to increase the applicability to a general-purpose Web document environment. Further, by appropriately replacing the zoom description language (ZDL), it is possible to display in accordance with the browsing situation and the viewer's preference.

  Next, content browsing processing in the client computer C will be described.

  The operation acquisition unit 31 is a unit that acquires the operation content of the viewer. For example, a zooming operation is performed by dragging the mouse 11 after designating a zooming target. In this case, when the mouse 11 is dragged below the display surface of the display 9, zoom-in is performed, and when the mouse 11 is dragged above the display surface of the display 9, zoom-out is performed.

  The display control means 32 is operated by the zoom target storage means 21 by the HDD 5 based on the browser operation contents acquired from the operation acquisition means 31 and the display description (structure description and zooming description) stored in the HDD 5 or the like by the content storage means 22. Media objects (text, still images, moving images, audio, etc.) stored in the display 9 are read, display / non-display of media objects on the display 9 and setting of detail level, automatic setting of media object display position, This is a means for controlling the display of the frame line around the media object. More specifically, the display control unit 32 interprets the display description (zooming description) stored in the content storage unit 22 and performs zooming display, thereby displaying / not displaying the media object displayed on the display 9 and the details. Set the degree.

  A web browser is applied as the operation acquisition unit 31 and the display control unit 32.

  Next, content display on the display 9 using the display description (structure description and zooming description) as described above will be described. Here, a case will be described in which ZDL that describes an operation / behavior is combined with HTML (Hyper Text Markup Language) that describes a structure.

  As a specific implementation method, for example, as shown in FIG. 5, the HTML that describes the structure on the server computer S side and the ZDL that describes the operation / behavior are read by the converter and converted into a pair of an HTML file and JavaScript. As a result, on the client computer C side, browsing and zooming operations can be performed with a general-purpose Web browser (operation acquisition unit 31 and display control unit 32).

  Note that the implementation method is not limited to this. For example, a portion that can be used universally in JavaScript code is prepared in advance without being generated each time, and only a portion that changes due to ZDL is generated and added by a converter. Alternatively, various methods such as a method of incorporating a plug-in having a function equivalent to the converter into the Web browser are conceivable.

(First example: Zoom propagation from the link source to the link destination and embedding the text of the link destination page in the link source to zoom display)
Here, an example will be described in which the zoom is propagated from the link source to the link destination, and the text of the link destination page is embedded in the link source to perform zoom display. When two HTML (page1.html, link1.html) describing the structure shown below are displayed, they are as shown in FIGS. 6 and 7, respectively. FIG. 7 is the content B that is the link destination of the anchor text “about the improvement of the new teaching material” in the content A that is the link source of FIG.

[Content structure description]
[page1.html]
<html xmlns = “http://www.w3.org/1999/xhtml” xml: lang = “ja” lang = “ja”>
<head>
<title> Consideration of the contents of new teaching materials </ title>
</ head>
<body>
<dl>
<dt>
<a href=“http://link1.html/”> Improvements in new materials </a>
</ dt>
<dt>
<a href=“http://link2.html/”> Demo of new materials </a>
</ dt>
......
......
</ dl>
</ body>
</ html>

[link1.html]
<html xmlns = “http://www.w3.org/1999/xhtml” xml: lang = “ja” lang = “ja”>
<head>
<title> Improvements of new teaching materials </ title>
</ head>
<body>
<p> Summary: Ask participants to comment on the content of the material. </ p>
<p> Since there are 1 to 9 steps, I want a function that can tell how far I have learned. </ p>
<p> How can I get new things out one after another, how can I get them to use it over and over (proposed questions) </ p>
<p> For those who are new to the interpreter memo in step 6, this is difficult to understand. </ p>
<p>It's hard to see the explanation in step 5. Excessive use of primary colors. </ p>
<p>I'm interested in BGM. </ p>
</ body>
</ html>

  The ZDL describing the following operation / behavior is applied to the HTML describing such a structure.

[Content zooming description]
<template name = “Overview” match = “/ html / body / dl” initZoomFactor = “0.0”>
<propagation destination = “Item” select = “dt” relation = “1.0” />
</ template>

<template name = “Item” match = “/ html / body / dl / dt” initZoomFactor = “0.0”>
<text select = “a”>
<dispText zoomFactor = “0.0” fontSize = “6pt” />
<dispText zoomFactor = “1.0” fontSize = “12pt” />
</ text>
<propagation destination = “ItemPage” select = “a” relation = “1.0” />
</ template>

<template name = “ItemPage” match = “/ html” initZoomFactor = “0.0”>
<text select = “body / p [1]”>
<dispText zoomFactor = “0.0” fontSize = “6pt” />
<dispText zoomFactor = “1.0” fontSize = “12pt” />
</ text>
<text select = “body / p [position ()>1]”>
<dispText zoomFactor = “0.3” fontSize = “6pt” />
<dispText zoomFactor = “1.0” fontSize = “12pt” />
</ text>
</ template>

  According to the above ZDL description, there are two types of zoom objects (“Overview” and “Item”) in the link source content A, the former corresponding to the entire zooming, and the latter corresponding to the zooming of each item. Yes. The former zooming propagates to the latter (<propagation destination = “Item”... />). The latter zooming further propagates to the link destination content (“ItemPage”) specified by <a href=... /> (<propagation destination = “ItemPage” select = “a”). As described above, when the value of the select attribute of the <propagation /> tag is “a”, the value is propagated to the link destination content B specified by the href attribute in the <a/> tag of the corresponding HTML file. .

  The zoom operation / behavior of the linked content B is described as <template name = “ItemPage”. It is assumed that the structure description (link1.html, link2.html, link3.html,...) Of the linked content B has the same structure and differs only in the text content. Therefore, one zoom operation / behavior description template can be commonly applied to them. Here, only the first line of text (p [1]) is displayed at 6pt when “ItemPage” has a zoom factor of 0.0, and the other lines (p [position ()> 1]) have a zoom factor of 0.3. Appears for the first time.

  Transition of zoom behavior based on these descriptions is shown in FIGS.

  The initial zoom rate is 0.0 for all of “Overview”, “Item”, and “ItemPage”. However, in the initial display state, only the anchor text of [page1.html] is displayed in 6pt (see FIG. 8). If the zoom-in operation is performed even a little, the first line of the linked content B appears at 6pt on the same screen. That is, when “Overview” is zoomed in, the first line of all link destinations (link1.html, link2.html, link3.html,...) Appears (see FIG. 9). Although not shown in the figure, if only “Item” corresponding to “About improvements of new teaching materials” is zoomed, only the first line of link1.html appears.

  When zooming in on “Overview” further from the state of FIG. 9, the zoom propagation rate between “Overview” and “Item” and between “Item” and “ItemPage” is 1.0 (relation = “1.0”). ), These zoom rates all change at the same rate of change. When the zoom ratios of “Overview”, “Item”, and “ItemPage” all become 0.3, the second and subsequent lines of linked content B appear at 6pt. At this time, the anchor text of [page1.html] and the size of the first line of the linked content B are increasing (see FIG. 10). When further zooming in from the state of FIG. 10 and all the zoom ratios become 1.0, all the texts of the link source and link destination are displayed in 12 pt (see FIG. 11).

  As a result, for the contents A and B in which a plurality of pages are linked by links, information (objects) of the link destination contents B can be embedded in the link source contents A for zooming display, so the same without losing the browsing context In addition to allowing browsing on the screen, a general zooming operation can be introduced.

(Second example: an example in which the zoom rate of the link source is propagated to the link destination page only within a predetermined range)
Next, an example in which the content is propagated to the linked content B page only within a range in which the zoom rate of the linked content A is determined will be described. The HTML file is the same as the above-described “example of zoom propagation from the link source to the link destination and embedding the text of the link destination page in the link source to zoom display”. A part of ZDL is different as follows.
<template name = “Item” match = “/ html / body / dl / dt” initZoomFactor = “0.0”>
<text select = “a”>
<dispText zoomFactor = “0.0” fontSize = “6pt” />
<dispText zoomFactor = “1.0” fontSize = “12pt” />
</ text>
<propagation destination = “ItemPage” select = “a” relation = “1.0”
l_factor = “0.4” />
</ template>

  That is, a new attribute description of l_factor = “0.4” is added to the <propagation /> tag of the zoom target “Item”. This means that zoom propagation to “ItemPage” occurs when the zoom ratio of “Item” is 0.4 or higher (a predetermined lower limit value or higher).

  Transition of zoom behavior based on such description is shown in FIGS.

  According to the above ZDL description, in the initial state, only the anchor text of [page1.html] is displayed in 6pt as in FIG. 8 (see FIG. 12). When zooming in on “Overview” from this state, the zoom propagation rate between “Overview” and “Item” and between “Item” and “ItemPage” is 1.0 (relation = “1.0”). All rates change at the same rate of change.

  Next, when “Overview” is zoomed in, in the above-mentioned “example of zoom propagation from link source to link destination and embedding the text of the link destination page in the link source for zoom display”, the first line of content B at the link destination immediately However, in this example, they are not displayed until the zoom ratio of “Overview” and “Item” becomes 0.4 (see FIG. 13). When the zoom ratio of “Overview” and “Item” becomes 0.4, propagation to “ItemPage” starts, and the first line of linked content B appears at 6 pt (see FIG. 14). Here, the zoom factor of “ItemPage” is 0.0.

  Subsequently, when zooming in further from FIG. 14 and the zoom rate of “ItemPage” reaches 0.3, the second and subsequent lines of the linked content B also appear (see FIG. 15). FIG. 16 shows a state in which the zoom ratio of “Overview” and “Item” reaches 1.0 after further zooming in from there. At this time, the zoom ratio of “ItemPage” is 0.6.

  Although not specifically illustrated, if the zoom rate of “Item” is less than or equal to a predetermined upper limit value (for example, 0.7 or less), if you want zoom propagation to “ItemPage”, the attribute description h_factor = “0.7” Can be added to the <propagation /> tag.

  As a result, in zoom propagation, zoom propagation is performed only when the zoom factor of the propagation source is in a pre-specified range, so that the content creator can set whether or not to propagate the zoom, and more flexible control is possible. It becomes like this.

(Third example: Example of zoom propagation from a link source to a specific part of a link destination, and embedding a still image of a link destination page in the link source to display a zoom)
Next, an example will be described in which zoom propagation is performed from the link source content A to a specific portion of the link destination content B, and a still image of the page of the link destination content B is embedded in the link source and zoomed. When two HTML files (page2.html, link100.html) describing the structure shown below are displayed, they are as shown in FIGS. 17 and 18, respectively. In FIG. 17, “AA's face photo” is associated with AA.gif in FIG. 18, and “BB's face photo” is associated with BB.gif in FIG.

[Content structure description]
[page2.html]
<html xmlns = “http://www.w3.org/1999/xhtml” xml: lang = “ja” lang = “ja”>
<head>
<title> Member list </ title>
</ head>
<body>
<dl>
<dt>
<a href=“http://link100.html#AA”>AA's photo </a>
</ dt>
<dt>
<a href=“http://link100.html#BB”>BB's photo </a>
</ dt>
......
......
</ dl>
</ body>
</ html>

[link100.html]
<html xmlns = “http://www.w3.org/1999/xhtml” xml: lang = “ja” lang = “ja”>
<head>
<title>Member's face photo </ title>
</ head>
<body>
<dl>
<dt>
<a name=“AA”><img src = “./ AA.gif” /></a>
</ dt>
<dt>
<a name=“BB”><img src = “./ BB.gif” /></a>
</ dt>
......
......
</ dl>
</ body>
</ html>

  The ZDL describing the following operation / behavior is applied to the HTML describing such a structure.

[Content zooming description]
<template name = “Overview” match = “/ html / body / dl” initZoomFactor = “0.0”>
<propagation destination = “Member” select = “dt” relation = “1.0” />
</ template>

<template name = “Member” match = “/ html / body / dl / dt” initZoomFactor = “0.0”>
<text select = “a”>
<dispText zoomFactor = “0.0” fontSize = “12pt” />
<dispText zoomFactor = “1.0” fontSize = “12pt” />
</ text>
<propagation destination = “MemberImage” select = “a” relation = “1.0” />
</ template>

<template name = “MemberImage” match = “/ html / body / dl / dt / a” initZoomFactor = “0.0”>
<img select = “img”>
<dispImg zoomFactor = “0.0” imgSize = “0%” />
<dispImg zoomFactor = “1.0” imgSize = “100%” />
</ text>
</ template>

  According to the above ZDL description, there are two types of zoom targets (“Overview” and “Member”) in the link source content A, the former corresponding to the entire zooming, and the latter corresponding to the zooming of each item, respectively. Yes. The former zooming propagates to the latter (<propagation destination = “Member” ... />). The latter zooming further propagates to the linked content (“MemberImage”) specified by <a href=... /> (<propagation destination = “MemberImage” select = “a”). Here, referring to a specific part of the HTML file of the linked content B such that the href attribute in the corresponding HTML <a/> tag is href = “http: //link100.html#AA” Note that

  The zoom operation / behavior of the linked content B is described as <template name = “MemberImage”. In the structure description (link100.html) of the linked content B, all the individual parts described in the format <a name=“AA”> have the same structure, and still image files (face photos) Only) are different. Therefore, one zoom operation / behavior description template can be commonly applied to them. Here, when the zoom factor of “MemberImage” is 0.0, the still image is the original 0% size (that is, nothing is displayed), and when the zoom factor becomes 1.0 after gradually zooming in, the original image Reach the same size.

  Transition of zoom behavior based on these descriptions is shown in FIGS.

  The initial zoom rate is 0.0 for all of “Overview”, “Member”, and “MemberImage”, and only the anchor text “AA's face photo”, “BB's face photo” ... is displayed in 12pt. (See FIG. 19). When zooming in on “Member” corresponding to “AA's face photo” from the state of FIG. 19, the zoom propagation rate between “Member” and “MemberImage” is 1.0 (relation = “1.0”). The zoom rate changes at the same rate of change. When “Member” is zoomed in, it is propagated to “MemberImage” corresponding to <a name=“AA”> in [link100.html]. Specifically, AA.gif is displayed and its size gradually increases (see FIG. 20). When zooming in further and the zoom ratio of “Member” and “MemberImage” reaches 1.0, AA.gif is displayed in its original size (see FIG. 21). In this zooming, the font size of “Aa's face photo” remains 12pt.

  As a result, a zoom operation / behavior description in which the zoom is propagated from the zoom target corresponding to the hyperlink propagation source to the zoom target corresponding to the linked content B in the structure description can be performed. The linked content B can be embedded and displayed in the same screen as A, and the display state of the embedded portion can be changed according to the zoom operation of the viewer.

(Fourth example: When the zoom source propagates from the link source to the specific part of the link destination, the anchor text of the link source gradually decreases)
Next, an example in which the anchor text of the link source B becomes gradually smaller when zoom propagation from the link source content A to the specific part of the link destination content B will be described. The HTML file is the same as the above-described “example of zoom propagation from the link source to the link destination and embedding the text of the link destination page in the link source to zoom display”. A part of ZDL is different as follows.
<template name = “Member” match = “/ html / body / dl / dt” initZoomFactor = “0.0”>
<text select = “a”>
<dispText zoomFactor = “0.0” fontSize = “12pt” />
<dispText zoomFactor = “1.0” fontSize = “0pt” />
</ text>
<propagation destination = “MemberImage” select = “a” relation = “1.0” />
</ template>

  That is, the anchor text included in “Member” gradually decreases as the zoom factor increases, and disappears at a zoom factor of 1.0.

  Transition of zoom behavior based on such description is shown in FIGS.

  According to the above ZDL description, the initial zoom ratio is 0.0 for all of “Overview”, “Member”, and “MemberImage”, and “A's face photo” “BB's face photo” ... Only the anchor text “12pt” is displayed in the same manner as in the above-described “example of zoom propagation from the link source to the link destination and embedding the text of the link destination page in the link source to zoom display” (FIG. 22). reference). When “Member” corresponding to “BB's face photo” is zoomed in from the state of FIG. 22, it is propagated to “MemberImage” corresponding to <a name=“BB”> in [link100.html] (zoom Propagation rate is 1.0). Specifically, the size of BB.gif is gradually increased after being displayed, but at the same time, the size of “Mr. BB's face photo” is reduced (see FIG. 23). Further, when zooming in and the zoom ratio of “Member” and “MemberImage” reaches 1.0, BB.gif is displayed in its original size, and “BB's face photo” disappears (see FIG. 24).

  As described above, according to the above ZDL description, it is possible to perform zoom propagation with respect to all or a part of the content linked to the hyperlink.

  In the above example, text and still images are taken up as media objects. However, the propagation to the link destination of HTML is not limited to these, and other media objects described in the zooming description language (moving images, Needless to say, the same applies to voice and the like.

It is a schematic diagram which shows the system construction example of the content browsing system concerning one Embodiment of this invention. It is a block diagram of the hardware of a general or standard personal computer. It is a block diagram which shows the function structure concerning the content display process of a server computer, and the content browsing process of a client computer. It is explanatory drawing which shows an example of a Web document model typically. It is explanatory drawing which shows the method of combining ZDL which described operation / behavior to HTML which described the structure. It is a front view which shows the example of a display of HTML (page1.html) which described the structure. It is a front view which shows the example of a display of HTML (link1.html) which described the structure. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 1st example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 1st example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 1st example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 1st example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 2nd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 2nd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 2nd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 2nd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in a 2nd example. It is a front view which shows the example of a display of HTML (page2.html) which described the structure. It is a front view which shows the example of a display of HTML (link100.html) which described the structure. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in the 3rd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in the 3rd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in the 3rd example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in the 4th example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in the 4th example. It is a front view which shows the example of a transition screen of the zoom behavior based on the ZDL description in the 4th example.

Explanation of symbols

C content browsing device S content display device

Claims (9)

For a plurality of contents composed of various objects that can be zoomed and linked to each other by anchors, all or part of the linked content is linked according to the zoom operation of the viewer with respect to the linked content Embedded in the content and displayed, and the display state is changed according to the zoom operation of the viewer with respect to the linked content displayed and embedded in the link source content.
A content browsing apparatus characterized by that. In a content display device that creates and displays content based on a structure description related to a display mode of content composed of various objects that can be zoomed and a zooming description that describes a zoom operation / behavior for each object ,
In the zooming description, if the object that is the zoom target of the content of the link source is zoomed with respect to the content linked to each other in the structure description, the content of the link destination is zoomed in conjunction with the zooming description. Zoom propagation between objects can be described such that the object is zoomed in a state where the object is embedded in the linked content.
A content display device characterized by that. The zooming description distinguishes the object to be zoomed from the object not to be zoomed.
The content display device according to claim 2. The zooming description is configured independently of the structure description.
The content display device according to claim 2. The zooming description can describe zoom propagation for all or part of the linked content.
The content display device according to claim 2, wherein the content display device is a content display device. In the zooming description, the zoom for the object that is the zoom target of the linked content is only included in the zoom description if the parameter indicating the degree of zoom for the object that is the zoom target of the content that is the link source satisfies a predetermined condition. A description that can be propagated is possible.
6. The content display device according to claim 2, wherein It is possible to describe that zoom propagation is executed for the object that is the zoom target of the linked content only when the zoom ratio for the object that is the zoom target of the linked content is equal to or greater than a predetermined lower limit. Is,
The content display device according to claim 6. It is possible to describe that zoom propagation is executed for the object that is the zoom target of the linked content only when the zoom rate for the object that is the zoom target of the linked content is equal to or less than a predetermined upper limit. Is,
The content display device according to claim 6. For a plurality of contents composed of various objects that can be zoomed and linked to each other by anchors, all or part of the linked content is linked according to the zoom operation of the viewer with respect to the linked content Embedded in the content and displayed, and the display state is changed according to the zoom operation of the viewer with respect to the linked content displayed and embedded in the link source content.
A content browsing method characterized by the above.