JPH07160703A - Structured document editing device - Google Patents

Abstract

PURPOSE:To show a user an edited picture in more natural arrangement and display. CONSTITUTION:An editor receives an SGML document 1 as the input and stores the edited result of an editing processing part 7 in a document holding part 6 in an SGML document form as the output. In the case of a new document, the editor makes the user designate the DTD and reads in only the DTD. When the editor reads in the SGML document and the DTD, the input is analyzed by an SGML parser 3. This parser 3 generates a finite automaton(DFA) 5 correspondingly to the DTD as the analysis result and stores it in a DTD holding part 4. A tree structure corresponding to the document structure is internally generated as the analysis result of the SGML document itself and is stored in the document holding part 6. A display device is determined based on action information corresponding to elements defined by document type definition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural document editing apparatus, and more particularly, to a structural document editing apparatus capable of showing an editing screen to a user in a more natural display layout.

[0002]

2. Description of the Related Art As a known document describing a conventional structured document editing apparatus, for example, Japanese Patent Laid-Open No. 2-247772.
There is a gazette. This publication allows users to manipulate the elemental logical structure of the document hierarchy regardless of whether tab display is required, and text as defined by the Standard Generalized Markup Language (SGML). It marks elements of a hierarchical document structure, including graphics, graphics images or other data. That is, in the structure document editing, the hierarchy of the structure including the element at the position of the cursor is displayed.

The SGML standard is a standard for standardizing the exchange of structured documents. Document structure is document type definition (D
TD, Document Type Definition). When creating a document according to the document structure specified by DTD, it is necessary to input the tag as plain text at the same time as the content and process the SGML document by batch processing, or use a structured document editor with a dedicated edit function. There is.

[0004]

In the conventional structured document editor, a method of expressing the start tag and the end tag on the screen at the same time as the character arrangement of the document is used as the expression of the tag. In this method: It is difficult to understand the tag range at a glance. It is difficult to understand the hierarchical relationship of tags at a glance. It has drawbacks such as difficulty in editing structural units.

In order to solve this, a tree structure is used,
It is possible to express a document by expressing tags as nodes. In this case, while the logical structure is directly expressed, there is a possibility that it may be inconsistent with the image when the actual layout is performed. What the user should be aware of is not what the document type definition defines, but what that means.

[0006]

When there is a document instance as described above, the hierarchy of elements is certainly easy to understand in such an indented display (title and p under chapter).
There is) The above expression is easier for the user to understand and input. In order to obtain such a display, some display information is required.

The present invention has been made in view of the above circumstances. (1) An output that is easy to understand for a user is stored by storing what kind of processing is to be performed for each element and reflecting it in the display. (Claims 1 to 4). Also,
(2) The advantage of structured documents is that they can be expected to be used for secondary purposes such as creating documents in a database. When using it as data in a database, it may be necessary for certain items to be filled in. It has external information that items need to be filled (action information), and when using this to create a document with an editor, by prompting the user to fill the items without fail, a document that can be easily used for secondary use. Can be created (Claim 5). Further, (3) the document type definition gives the structure of the document, but cannot give a constraint on its content. For example, when there is an element that is known to contain items such as dates, it is convenient to be able to restrict non-date expressions from being entered as items on the editor.
Information for setting the restriction of the element of the structured document for each element is prepared externally (action information), and the restriction is set at the time of input based on the information on the editor (claim 6). In this way, it is possible to expect that the contents of a specific format will be included in the items of the document created by setting restrictions, and a structured document editing device that makes it easy to use the document such as creating a database It is intended to be provided.

[0009]

In order to achieve the above object, the present invention (1) analyzes an SGML document and creates a finite state automaton corresponding to the document type definition and a tree structure corresponding to the document structure inside. An SGML parser to be created, a document definition holding unit that stores a finite state automaton created by the SGML parser, a document holding unit that stores the tree structure created by the SGML parser, and an action information storage unit that stores action information. And an edit processing unit for instructing screen display, and for the document instance based on the document type definition, determining the display position based on the action information corresponding to the element defined in the document type definition, or (2) For the document instance based on the document type definition, based on the action information corresponding to the element defined in the document type definition To determine the shows content, or,
(3) Regarding the document instance based on the document type definition,
Generate a new display element based on the action information corresponding to the element defined in the document type definition, or (4) correspond to the element defined in the document type definition for the document instance based on the document type definition. Generate and display the document contents based on the action information, or (5) for the document instance based on the document type definition, specify the required items of the document based on the action information corresponding to the elements defined in the document type definition. Approve and notify that the required field is blank when the required field is blank at the end of document editing, or (6) Document instance based on the document type definition corresponds to the element defined in the document type definition. The feature is that the content such as the character type that can be included in the document element is limited based on the action information.

[0010]

The SGML parser analyzes the SGML document and creates a finite state automaton (DFA) corresponding to the document type definition and a tree structure corresponding to the document structure inside. The finite state automaton is stored in the document definition holding unit, and the tree structure is stored in the document holding unit. The edit processing unit gives an instruction for screen display.

[0011]

FIG. 1 is a block diagram of a structural document editing apparatus according to the present invention. In the figure, 1 is an SGML document, 2 is action information, 3 is an SGML parser, 4 is a DTD holding unit, and 5 is a DF.
A (finite automaton), 6 is a document holding unit, 7 is an edit processing unit, 8 is a document tree structure, 9 is an action information holding unit, 1
Reference numeral 0 is a display input unit.

The input of the editor is DT in the SGML document.
Designation of D or DTD itself is described. The editor receives the SGML document as an input, and stores the edit result of the edit processing unit 7 in the document holding unit 6 in the SGML document format as an output. In the case of a new document, the user is asked to specify the DTD and only the DTD is read. Editor is SG
When reading an ML document / TDD, first input SGM.
Analyze with L parser 3. The SGML parser 3 has a finite state automaton (DFA) 5 corresponding to DTD as an analysis result.
Is created and stored in the DTD holding unit 4 (FIG. 2). DFA
Represents the possible sequence of nodes under each tag.

FIG. 2 is a diagram showing the DFA for one tag "kaigi". A DFA is created for each tag defined by DTD. In subsequent processing, it will be used S
Continue parsing the GML document. As a result of the analysis of the SGML document itself, a tree structure corresponding to the document structure is created inside as shown in FIG. The created tree structure is stored in the document holding unit 6. Information is stored for each type in each node of the tree structure.

Tag: tag name, attribute data: character string data processing instruction: character string data Further, information common to the nodes is also stored. Visible state: Should the node be displayed on the screen? Highlight: Should it be highlighted on the screen? Node pointer: Pointer information to parent, child, and sibling nodes. The usage of this information will be described later.

FIG. 4 is a diagram showing a part of the DTD of the SGML document corresponding to FIGS. 2 and 3. In addition, FIG.
It is a figure which shows a part of example of the document using the DTD of FIG. FIG. 6 is a diagram showing an example of action information. The content of the action information is read at the time of reading the document instance and DTD, and is stored in the action information holding unit 9.
In this embodiment, the action information is written by the description of the lisp style, and the action information is written in the part enclosed by <> at the beginning of (). This is called a trigger. Among the elements, the element that matches the condition written in the trigger is subjected to the operation described in the subsequent description.

For example, <chapter> is the element chapter
Indicates that the previous element should be placed vertically and the chapter number should be displayed. show indicates what to display on the screen. “Fore-align / back-align” indicates what kind of alignment is performed with respect to the front / back of the user. The display unit interprets the designation regarding the display position such as fore-align / back-align and arranges the elements (claim 1). At that time, the action description is also referred to for each display content. The font of the displayed character is determined by referring to the show attribute (claim 2). If there is post-insert as an attribute, a display object is separately generated (claim 3).

FIG. 7 is a flow chart for explaining the operation of generating an object on the display in the display section. Hereinafter, each step will be described in order. First,
One element is extracted by tracing the document tree structure in the order of arrival (step 1). Next, it is judged whether or not there is a node (step 2), and if there is no node, the processing is ended. If there is a node, then the specification for the node is extracted from the action information (step 3). Calculate the relative position with the display object before fore-align / back-align (step 4). Next, create a display object based on the front / show attribute
(step5). Next, if there is a post-inset attribute, a corresponding display object is generated, and the process returns to step 1. This is called when a screen display instruction is given by the edit processing unit. An example of a screen drawn by these processes is shown in FIG.

The element title has a show attribute of no. This means not to display, but when operating the element, we want to operate on the display object, so create a small empty display object on the screen and save it for the element of another editor. Be prepared to operate. Also, title is fore-align
Both / back-align are horizontal and are placed horizontally with respect to the previous object, and their child, #CDATA (character content) is also placed horizontally.

FIG. 9 is a flowchart showing a reading process for the document holding unit. Hereinafter, each step will be described in order. First, the parser is called to create a DTD document tree structure (step 1). Next, one is taken out for each node of the document tree structure (step 2). Next, it is judged whether or not the content of the node is filled (step 3). If it is not filled, then the action information applicable to that node is set.
Determine whether there is a default attribute (step 4). defaul
If there is a t attribute, then the default contents are inserted as specified (step 5). In this way, the default attribute designates the process of automatically filling the items when the document is read (claim 4). FIG. 10 shows an example of action information having a default attribute. In the example of FIG. 10, when the content of the element today is empty, it is automatically filled.

FIG. 11 is a flowchart of the essential attribute check. Hereinafter, each step will be described in order. First, search each node of the document tree structure for which the require attribute is specified and the content is empty (step 1).
Next, determine if such a thing exists (step
2) If it exists, output a warning message (ste
p3). If it does not exist, normal document saving processing is performed (step
Four). In this way, in the document saving process, the attribute requir
e is checked. A warning message is displayed to the user to notify the user when an item is not filled for the element designated as require (claim 5).

FIG. 12 is a flowchart of the restriction attribute process. Hereinafter, each step will be described in order. First, it is judged whether or not the input node has the restrict attribute (step1), and if there is the restrict attribute, then it is judged whether the content complies with the restriction (step2). Output message (ste
p3). In this way, the attribute restrict is interpreted during document editing. When it is considered that the operation of editing the character string in the display object is finished, it is checked whether the restriction is met (claim 6).

[0022]

As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: With respect to the document instance based on the document type definition, the display position is determined based on the action information corresponding to the element defined in the document type definition, so that the editing screen is arranged more naturally. Can be shown to the user with. (2) Effect corresponding to claim 2: For the document instance based on the document type definition, the content to be displayed is determined based on the action information corresponding to the element defined by the document type definition, so that the editing screen is more natural. It can be shown to the user on the display. (3) Effect corresponding to claim 3: With respect to the document instance based on the document type definition, the display element is newly generated based on the action information corresponding to the element defined in the document type definition. It can be shown to the user on the display. (4) Effect corresponding to claim 4: For the document instance based on the document type definition, the document content is generated and displayed based on the action information corresponding to the element defined by the document type definition. It can be omitted. (5) Effect corresponding to claim 5: For the document instance based on the document type definition, the required items of the document are identified based on the action information corresponding to the element defined in the document type definition, and when the document editing is completed, etc. When the required item is blank, the user is informed of it, so that the required item can be specified without omission. (6) Effect corresponding to claim 6: With respect to the document instance based on the document type definition, the content such as the character type that can be included in the document element is limited based on the action information corresponding to the element defined in the document type definition. , You can create documents without incorrect input.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a structural document editing device according to the present invention.

FIG. 2 is a diagram showing a DFA in the present invention.

FIG. 3 is a diagram showing a tree structure of a document holding unit in the present invention.

FIG. 4 is a diagram showing an example of DTD in the present invention.

FIG. 5 is a diagram showing an example of an SGML document according to the present invention.

FIG. 6 is a diagram showing an example of action information according to the present invention.

FIG. 7 is a flowchart of a display process according to the present invention.

FIG. 8 is a diagram showing an example of a screen in FIG.

FIG. 9 is a flowchart of a reading process according to the present invention.

FIG. 10 is a diagram showing an example of action information in FIG. 9.

FIG. 11 is a flowchart of essential attribute check in the present invention.

FIG. 12 is a flowchart of a restriction attribute process according to the present invention.

[Explanation of symbols]

1 ... SGML document, 2 ... action information, 3 ... SGML
Parser, 4 ... DTD holding unit, 5 ... DFA (finite automaton), 6 ... Document holding unit, 7 ... Editing processing unit, 8 ... Document tree structure, 9 ... Action information holding unit, 10 ... Display input unit.

Claims (6)

[Claims] 1. An SGML parser which analyzes an SGML document and creates a finite state automaton corresponding to a document type definition and a tree structure corresponding to the document structure therein, and a document which stores the finite state automaton created by the SGML parser. The document type definition includes a definition holding unit, a document holding unit that stores the tree structure created by the SGML parser, an action information storage unit that stores action information, and an edit processing unit that instructs screen display. A structural document editing device, characterized in that a display position of a document instance based on is determined based on action information corresponding to an element defined by a document type definition. 2. An SGML parser that analyzes an SGML document and creates a finite automaton corresponding to the document type definition and a tree structure corresponding to the document structure inside, and a document that stores the finite automaton created by the SGML parser. The document type definition includes a definition holding unit, a document holding unit that stores the tree structure created by the SGML parser, an action information storage unit that stores action information, and an edit processing unit that instructs screen display. A structured document editing device, characterized in that display contents of a document instance based on are determined based on action information corresponding to elements defined by a document type definition. 3. An SGML parser that analyzes an SGML document and creates a finite state automaton corresponding to a document type definition and a tree structure corresponding to the document structure therein, and a document that stores the finite state automaton created by the SGML parser. The document type definition includes a definition holding unit, a document holding unit that stores the tree structure created by the SGML parser, an action information storage unit that stores action information, and an edit processing unit that instructs screen display. A structural document editing device, which newly generates a display element based on action information corresponding to an element defined by a document type definition, for a document instance based on. 4. An SGML parser that analyzes an SGML document and creates a finite state automaton corresponding to a document type definition and a tree structure corresponding to the document structure therein, and a document that stores the finite state automaton created by the SGML parser. The document type definition includes a definition holding unit, a document holding unit that stores the tree structure created by the SGML parser, an action information storage unit that stores action information, and an edit processing unit that instructs screen display. A structured document editing device characterized by generating and displaying document contents based on action information corresponding to an element defined by a document type definition, for a document instance based on. 5. An SGML parser which analyzes an SGML document and creates a finite state automaton corresponding to a document type definition and a tree structure corresponding to a document structure therein, and a document which stores the finite state automaton created by the SGML parser. The document type definition includes a definition holding unit, a document holding unit that stores the tree structure created by the SGML parser, an action information storage unit that stores action information, and an edit processing unit that instructs screen display. Regarding the document instance based on, certify the required items of the document based on the action information corresponding to the elements defined in the document type definition, and notify that the required items are blank when the required items are blank at the end of document editing, etc. A structured document editing device characterized by the above. 6. An SGML parser that analyzes an SGML document and creates a finite state automaton corresponding to a document type definition and a tree structure corresponding to the document structure therein, and a document that stores the finite state automaton created by the SGML parser. The document type definition includes a definition holding unit, a document holding unit that stores the tree structure created by the SGML parser, an action information storage unit that stores action information, and an edit processing unit that instructs screen display. A document instance based on the above, based on action information corresponding to an element defined in a document type definition, a structured document editing apparatus which limits contents such as a character type that can be included in the document element.