Abstract:
A method and systems for copying textual objects from source documents into an object document, and for tagging, linking and processing said copied textual portions, including the disclosure of a new type of hyperlinking mechanism, for enabling to identify and trace the sources and the authorship of said copied textual portions or of all textual sub-portions or fragments of text that could be generated from said copied textual portions by editing the object document. The invention can be implemented by means of software implementing the disclosed system and method running on word-processors and web browsers.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates generally to methods and systems for authoring, referencing, and manipulating documents and more specifically to a method and systems for linking sources to text copied from these sources. 
       BACKGROUND OF THE INVENTION 
       [0002]    Computer objects such as texts or images are very often cut or copied from one document e.g., from a web page, and pasted into another document e.g., in a Lotus WordPro document (Lotus and WordPro are Trademarks of International Business Machine Corporation). Different types of objects, such as text portions, images, or audio clips, can be copied by a user from multiple source documents and pasted into an object document. It is a common practice today, for many people, to compose documents including portions that are “imported” i.e., copied and pasted, from another documents e.g., from web pages accessed through the Internet. 
         [0003]    Most of modern word processing application programs allow a user to copy blocks of text from different documents and to transfer them to another document. Copying an item such as a block of text from a first document into a second document is generally referred to as a “copy and paste operation”. When an item is copied from a source document, it is generally stored in a temporary buffer called a clipboard. This allows the user to later paste the item into the desired object document, at the right location. The action of transferring the copied item to a determined location of the object document is referred to as “paste”. 
         [0004]    Authors and publishers place considerable proprietary value in their creations and in particular, in the textual passages they generate e.g., in newspapers and magazine articles. Unfortunately, the ease with which textual passages can be duplicated in electronic storage media presents the problem that such passages can be copied and/or incorporated into other electronic documents without proper attribution or remuneration of the original author. This copy may occur either without modification of the original passage or with minor revisions such that original authorship cannot reasonably be disputed. Furthermore, authors and researchers often have the need to locate the sources of given passages cited in documents, but frequently do not know the title, author, date of publication, or other identifying features of the original work. As a consequence, unless the user has an exact quotation, it can be very difficult to find the source of the passage in order to give proper recognition to the original author. 
         [0005]    When objects such as text portions are copied from one or from several source documents into an object document, source information is the information required to identify the source documents from which each one of said text portions have been copied. Source information may include, for example, address where the document can be found, copyright information, authorship information, references to contract&#39;s terms and conditions, citations and footnotes. When portions of documents are copied through networks, such as the Internet, source information may include, for instance, the Uniform Resource Locator (URL) of a web page from which a text portion has been copied. 
         [0006]    According to the prior art, several systems and methods exist for providing source information of an object copied from a first document and inserted into a second document. For example, U.S. patent application Ser. No. 10/165,083, by Keohane et al., discloses a method, apparatus, and computer instructions for automatically generating source information for an object that is cut or copied from a document and inserted into another document. The source information can be stored, hidden, or pasted into the destination document, and can also trigger automatically the generation of a footnote for the destination document. 
         [0007]    An important limitation not solved by Keohane et al., nor by the other known methods for providing source information of copied textual objects, lies in the lack of persistency of the source information. By lack of persistency of the source information, one should understand that, if an object e.g., a portion of text, copied by a user from a source document to an object document, is itself edited by the user in the second document e.g., a portion of the copied text is modified, or if a sub-portion is cut and pasted by the user into a different paragraph of the object document, the source information associated to the copied portion, and the generated sub-portions, is lost. 
         [0008]    The traceability and the persistency of copied objects is an important issue for intellectual property protection and copyrights enforcement. As it is widely established by copyright laws in most countries, material paraphrased or summarized from other sources should be, clearly indicated as such, and it should be clearly distinct from the author&#39;s own statements and credited to the original source. 
         [0009]    Moreover, not merely to enforce copyrights protection, but also for the purposes of authoring, documenting and referencing edited materials, when the copy and paste process is used during a document edition, it would be very useful to automatically create a link, or hyperlink, from each textual portion copied into an object document, to the source document from which said textual portion has been copied. Furthermore, it would be required not only to automatically associate links, or hyperlinks, from copied textual portions to the source information, but also from all textual sub-portions or textual fragments that could be generated therefrom when editing the object document. 
         [0010]    Therefore, there is a need to provide a method and systems for identifying imported textual objects which have been copied or have been generated by editing textual objects already copied from other source documents. There is also a need to provide a method and systems for referencing and accessing, from imported textual objects, copied from different documents, or originated by editing text already copied from different documents, the source documents from which they have been copied. 
       SUMMARY OF THE INVENTION 
       [0011]    Thus, it is a broad object of the invention to remedy the shortcomings of the prior art as described here above. 
         [0012]    It is another object of the present invention to provide a method and systems for identifying into a text document, textual portions that have been copied or imported from other documents, while referencing, in each copied portion, the source document from which it has been copied. 
         [0013]    It is another object of the invention to provide a method and systems for marking and highlighting copied textual portions and for warning a user when attempting to edit a copied textual portion. 
         [0014]    It is another object of the invention to provide a method and systems for persistently identifying all textual sub-portions generated when splitting copied textual portions or removing words or letters in copied textual portions, and to reference, in each of them, the corresponding source documents from which they have been copied. 
         [0015]    It is still another object of the invention to provide a method and systems for accessing, from a selected copied textual portion or sub-portion, the source document from which said portion or sub-portion has been copied. 
         [0016]    It is a particular object of the invention to provide a method and systems for automatically identifying and highlighting copied textual portions or sub-portions in the object document. 
         [0017]    The accomplishment of these and other related objects is achieved by a temporary computer object for copying and pasting text from a first electronic document to a second electronic document, said computer object comprising,
       a first tag marking the beginning of the header of said temporary computer object;   the address of said first electronic document;   a second tag marking the end of said header of said temporary computer object;   said copied text to be pasted; and,   a third tag marking the end of said temporary computer object,       
 
         [0023]    by a method for copying a selected text from a first electronic document into a temporary computer object as defined above, said method comprising the steps of,
       creating said temporary computer object;   getting the address of said first electronic document;   copying said address of said first electronic document into said created temporary computer object;   getting said selected text from said first electronic document;   copying said selected text into said created temporary computer object; and,   storing said created temporary computer object, by a method for pasting a text from a temporary computer object as defined above into a second electronic document, said method comprising the steps of,   checking if said second electronic document comprises said first tag marking the beginning of the header of a temporary computer object;   if said second electronic document comprises said first tag marking the beginning of the header of a temporary computer object,   checking if the text to paste stored within said temporary computer object comprises said first tag marking the beginning of the header of said temporary computer object;   if the text to paste stored within said temporary computer object comprises said first tag marking the beginning of the header of said temporary computer object,
           extracting the identifiers associated to each of said first tag marking the beginning of the header of the temporary computer object comprised within said text to paste;   
           extracting the identifier associated to said temporary computer object; and,   modifying all of said extracted identifiers that are identical to the one contained within said second electronic document,       
 
         [0037]    by a method for checking edited text to track modifications in text copied from a first document, said copied text being stored according to the temporary computer object structure as defined above, said method comprising the steps of,
       if a portion of text is removed or inserted in said copied text,
           inserting said third tag marking the end of a temporary computer object, at the position where said portion of text is removed or at the position preceding the one where said portion of text is inserted; and,   inserting a string formed by concatenating said first tag marking the beginning of the header of a temporary computer object, the address associated to said copied text, and said second tag marking the end of the header of a temporary computer object, at the position where said portion of text is removed or at the position preceding the one where said portion of text is inserted;   
               
 
         [0041]    and by a method for accessing a first electronic document from a second electronic document comprising a portion of text pasted from a temporary computer object as defined above, said temporary computer object storing said portion of text extracted from said first electronic document and the address of said first electronic document, said method comprising the steps of,
       selecting said temporary computer object storing said portion of text;   extracting the address stored within said selected temporary computer object;   accessing said first electronic document using said address; and,   displaying said first electronic document.       
 
         [0046]    Further embodiments of the invention are provided in the appended dependent claims. 
         [0047]    According to one aspect of the invention, a method is disclosed for enabling the author of an object document to import textual portions from other source documents, and to edit said object document while automatically referencing and linking all imported textual portions and all textual sub-portions created from them when editing the object document, to the source documents from which they have been imported. 
         [0048]    According to another aspect of the invention, a method is disclosed for enabling the author or the recipient of a document comprising textual portions or fragments of textual portions copied from a plurality of source documents, to identify those textual portions. 
         [0049]    According to another aspect of the invention, a method is disclosed for enabling the author or the recipient of a document comprising textual portions or fragments of textual portions copied from a plurality of source documents, to access the corresponding source documents, and to automatically search and locate in said source documents, source text from which said textual objects have been copied. 
         [0050]    One of the advantages of the invention is that, not only all copied textual portions, but also all textual sub-portions generated from a textual portion copied from a source document in the object document, remain persistently linked to the source document from which the original textual portion has been copied. 
         [0051]    The invention can be practiced by means of software implementing the disclosed systems and method running on word processors, web browsers, and the likes. 
         [0052]    Further advantages of the present invention will become apparent to the ones skilled in the art upon examination of the drawings and detailed description. It is intended that any additional advantages be incorporated herein. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0053]      FIG. 1  illustrates a block diagram of a generic computer device in which the present invention can be implemented. 
           [0054]      FIG. 2  depicts the main steps of the modified copy function according to the invention. 
           [0055]      FIG. 3  shows the main steps of the access function according to the invention. 
           [0056]      FIG. 4 , comprising  FIG. 4   a  to  FIG. 4   e , illustrates the main steps of the use of the modified copy function according to the invention. 
           [0057]      FIG. 5  illustrates an example of the warning message displayed to the user when attempting to copy a copied text. 
           [0058]      FIG. 6  depicts an example of accessing the source document from a copied portion of text. 
           [0059]      FIG. 7 , comprising  FIGS. 7   a  and  7   b , depicts an example of the use of the encapsulated object structure according to one embodiment of the invention. 
           [0060]      FIG. 8  depicts the main steps of the modified copy function for encapsulated object structure according to the invention. 
           [0061]      FIG. 9  shows the main steps of the access function for encapsulated object structure according to the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0062]      FIG. 1  illustrates a block diagram of a generic computer device, handheld device, or any kind of network connected device, generally referred to as computer  100 , in which the present invention can be implemented. The system has a central processing unit (CPU)  105 , a Read-only Memory (ROM)  110 , a Random Access Memory (RAM)  115 , and an I/O subsystem  120 , all of them being connected to a system bus  125 . The I/O subsystem  120  may include one or more controllers for input/output devices such as keyboard  130 , cursor control device  135 , display device  140 , mass storage device  145 , and network interface  150 . Depending upon the application of the system  100 , one or more further I/O devices may be connected to the I/O subsystem  120 . Typically, the hardware system  100  is controlled by an operating system that can be stored in ROM  110  or in mass storage device  145 , which in turn controls various tools and applications that are generally loaded in RAM  115 . 
         [0063]    According to the invention there is provided a set of modified functions for word processors, web browsers, and more generally for all computer applications allowing text copy, cut and/or paste functions, and text edit function. The aim of this modified set of functions is to get the data source information of a text when it is copied and to transmit this data source information within the text when it is pasted or edited. 
         [0064]    Set of Modified Functions 
         [0065]    The set of modified function comprises at least a modified copy function and a modified paste function. In a preferred embodiment, the set of modified functions further comprises an edit monitoring function and an access function. 
         [0066]    Modified Copy Function 
         [0067]    According to the modified copy function, source information associated to the selected text to be copied is extracted and associated with the selected text to be copied in a dedicated data structure, referred to as copied object. In a preferred embodiment, the copied object structure is as follows,
       &lt;{circle around (c)}href=“path or URL”; optional data {circle around (c)}&gt; copied text &lt;/{circle around (c)}&gt;
 
wherein,
       
 
         [0069]    &lt;{circle around (c)}marks the beginning of the header of the copied object structure; 
         [0070]    href=“path or URL” encodes the path or URL of the document from which the copied text has been extracted; 
         [0071]    ; is a separator. This symbol is used only in the case where “optional data” is stored in the object along with the source information; 
         [0072]    optional data encodes additional optional source information, such as the name of the author, the date of creation, and the owner of intellectual property rights of the source document; 
         [0073]    {circle around (c)}&gt; marks the end of the copied object structure header; 
         [0074]    copied text is the portion of text that has been extracted from the source document; and, 
         [0000]    &lt;/{circle around (c)}&gt; marks the end of the copied object structure. 
         [0075]    As illustrated on  FIG. 2  and according to the modified copy function, the following steps are executed when this function is invoked, once having selected the text to be copied,
       creating a copied object (step  200 );   getting the source information (step  205 );   copying the source information within the header of the created copied object (step  210 );   getting the selected text to be copied (step  215 );   copying the selected text within the created copied object (step  220 ); and,   storing the created copied object into the clipboard buffer (step  225 ).       
 
         [0082]    The source information can be easily accessed from the information associated to the document from which the text is being copied, or from the properties of this document. For example, according to Lotus WordPro word processor (Lotus and WordPro are Trademarks of International Business Machine Corporation), the file path, the name of the author, the date of creation, and many other attributes can be viewed when looking at the document properties. 
         [0083]    As it will become apparent to the one skilled in the art, the modified copy function can be used to create a modified cut function where the main differences consist in the further step of removing the selected text in the source document. 
         [0084]    In a further embodiment, the modified copy function further comprises a test to determine whether or not the selected text has been previously copied from another source document. Such enhanced modified copy function further comprises the steps of,
       parsing the selected text for checking the presence of copied text portions by checking the presence of tags marking the beginning of copied object structure headers e.g., &lt;{circle around (c)}, the presence of tags marking the end of copied object structure headers e.g., {circle around (c)}&gt;, or the presence of tags marking the end of copied object structures e.g., &lt;/{circle around (c)}&gt;; and,   if copied text portions are found in the selected text, forewarning the user.       
 
         [0087]    Preferably, the source addresses or URLs of the copied text portions are shown to the user when he/she is forewarned, by extracting the path or URL from the header of each copied object found in the selected text. 
         [0088]    Modified Paste Function 
         [0089]    The standard paste function is not modified in itself. It essentially consists in copying the copied object stored into the clipboard, in the object document, at the cursor location. The copied object is copied in the object document, in its entirety i.e., the text to be copied and the source information are copied in the object document. Depending upon display option setup, source information is displayed or not. In a preferred embodiment, the copied text is highlighted so that it appears differently than text that has not been copied or that has been copied from different sources. Still in a preferred embodiment, the copied text is highlighted only when the cursor is located over an area of copied text. To that end, the application checks the tag marking the end of the copied object header e.g., {circle around (c)}&gt;, and the tag marking the end of the copied object e.g., &lt;/{circle around (c)}&gt;, and highlights the text comprised between both tags if the cursor is located over the corresponding text. For example, highlighting copied text can consist in using a particular background colour e.g., yellow background. 
         [0090]    When only displaying the copied text of a copied object i.e., when the source information must not been displayed, the display function parses the copied object to determine the tags marking the copied object e.g. &lt;{circle around (c)}, {circle around (c)}&gt;, and &lt;/{circle around (c)}&gt;, and the data comprised in the header e.g., between tags &lt;{circle around (c)}, {circle around (c)}&gt;. The tags marking the copied object e.g. &lt;{circle around (c)}, {circle around (c)}&gt;, and &lt;/{circle around (c)}&gt;, and the data comprised in the header e.g., between tags &lt;{circle around (c)}, {circle around (c)}&gt;, are not displayed. 
         [0091]    Edit Monitoring Function 
         [0092]    Editing a text implies that the text can be modified: some portions of the text can be removed and/or other portions of text can be inserted. An inserted portion of text can be typed or can be copied from another document. As a consequence, when a text is edited, the system must be able to track which parts of text have been modified and must keep the source information of copied text that is not modified. 
         [0093]    If a portion of text is copied from another source document, the modified copy and paste functions are used to associate the source information to the copied text, as described above. 
         [0094]    According to the invention, a background function, referred to as edit monitoring function, monitors the position of the cursor in the text in order to determine if portions of text are inserted or removed in the copied text, preferably highlighted. 
         [0095]    When a portion of text is inserted or removed, the edit monitoring function checks if the cursor is positioned within copied text. This is done by checking if the text portion comprising the cursor is highlighted, by checking if the tag marking the beginning of the copied object structure header e.g., &lt;{circle around (c)}, is located before the cursor and no tag marking the end of the copied object structure e.g., &lt;/{circle around (c)}&gt;, is located between the cursor and the tag marking the beginning of the copied object structure header, or by checking if the tag marking the end of the copied object structure e.g., &lt;/{circle around (c)}&gt;, is located after the cursor and no tag marking the beginning of the copied object structure header e.g., &lt;{circle around (c)}, is located between the cursor and the tag marking the end of the copied object structure. 
         [0096]    When a portion of text is removed from a copied text, the tag marking the end of the copied object structure e.g., &lt;/{circle around (c)}&gt;, is inserted where the portion of text has been removed. The header of the copied object preceding the cursor, with the tags marking the beginning and the end of the copied object structure header, is copied where the portion of text has been removed, behind the inserted tag marking the end of the copied object structure. 
         [0097]    Let us consider, for sake of illustration, the following text, where the tags and the source information are apparent, This is an example of copied text, &lt;{circle around (c)}href=“C:\tmp\test.txt”{circle around (c)}&gt; here is copied text &lt;/{circle around (c)}&gt;. 
         [0098]    If the word “the” of the copied text is removed, the new text, where the tags and the source information are apparent, looks like, This is an example of copied text, &lt;{circle around (c)}href=“C:\tmp\test.txt”{circle around (c)}&gt; here is &lt;/&gt; &lt;{circle around (c)}href=“C:\tmp\test.txt”{circle around (c)}&gt; copied text &lt;{circle around (c)}&gt;. 
         [0099]    If a portion of text is inserted in a copied text, the tag marking the end of a copied object structure e.g., &lt;/{circle around (c)}&gt;, is inserted where the portion of text has been inserted, preceding the inserted portion of text. The header of the copied object preceding the cursor, including the tags marking the beginning and the end of the copied object structure header, is copied where the portion of text has been inserted, behind the inserted portion of text. 
         [0100]    Let us consider, for sake of illustration, the previous example, where the tags and the source information are apparent, This is an example of copied text, &lt;{circle around (c)}href=“C:\tmp\test.txt”{circle around (c)}&gt; here is the copied text &lt;/{circle around (c)}&gt;. 
         [0101]    If the words “example of” are inserted after the word “the” of the copied text, the new text, where the tags and the source information are apparent, looks like, 
         [0000]    This is an example of copied text, &lt;{circle around (c)}href=“C:\tmp\test.txt”{circle around (c)}&gt; here is the &lt;/{circle around (c)}&gt; example of &lt;{circle around (c)}href=“C:\tmp\test.txt”{circle around (c)}&gt; copied text &lt;/{circle around (c)}&gt;. 
         [0102]    In another embodiment, the edit monitoring function comprises the step of marking all the words of copied text so as to identify non marked words corresponding to words that have been added. According to this embodiment, the edit monitoring function comprises the steps of,
       prior to editing a copied text, marking all the words of the copied text e.g., by appending the symbol ‘*’ in front of each word of the copied text; and,   after editing the copied text,
           identifying all marked word fragments i.e., sets of contiguous marked words; and,   for each marked word fragment, creating an object structure that header is the one of the copied object corresponding to the edited copied text.   
               
 
         [0107]    Obviously, different marking symbols can be used to mark portions of text copied from different source documents. 
       Access Function 
       [0108]    An access function is preferably provided to the user so that he/she could readily identify, locate and retrieve the source document from which the text that he/she is manipulating e.g., displaying or editing, has been copied. Such function can be triggered when the cursor is located over an area of copied text, either by clicking the pointing device on the copied text area, by selecting the access function in a menu or a popup menu, or even by using control keys. As shown on  FIG. 3 , the main steps of the access function are,
       selecting the copied object corresponding to the copied text pointed by the cursor (step  300 );   extracting the path or URL stored within the selected copied object (step  305 );   accessing the source document using the path or URL (step  310 ); and,   displaying the source document (step  315 ).       
 
         [0113]    Displaying the source document can be done according to the standard method consisting in analyzing the type of the source document e.g., according to the file extension, and launching the corresponding application according to a correspondence table e.g., file MIME type, generally maintained by the operating system. 
         [0114]    In a further embodiment, the copied text portion is highlighted in the source document. Searching the copied text can be done, for example, by means of standard string matching algorithm, by sequentially comparing the copied text portion with the source document. 
       Example 
       [0115]      FIGS. 4   a  to  4   e  illustrate the main steps of the method of using the modified copy function, according to the invention.  FIG. 4   a  shows a typical example of an e-mail  400  in which a user wants to copy the text selected on the web page shown on  FIG. 4   b . As illustrated, the e-mail  400  comprises a header  405  with information about the sender, the recipient, and the e-mail subject, and a text area  410  where the user types his/her message. In this example, the user has already typed a first part of the message. The cursor  415  points to the position where the user can type new text or where he/she can paste copied text. The web page  420  of  FIG. 4   b  comprises selected text  425  that the user wants to copy in his/her e-mail at the cursor position.  FIG. 4   c  shows the copied object created after copying the selected text of  FIG. 4   b , including the corresponding source information i.e., the URL  430 . 
         [0116]      FIG. 4   c  depicts the copied object created after copying the selected text  425  from the web page  420  shown on  FIG. 4   b . As described above, the created copied object comprises a tag &lt;{circle around (c)}marking the beginning of the copied object structure header, the hyperlink reference  435  comprising the URL  430 , a tag {circle around (c)}&gt; marking the end of the copied object structure header, the text  440  which is copied, that corresponds to selected text  425 , and a tag &lt;/{circle around (c)}&gt; marking the end of the copied object structure. 
         [0117]      FIG. 4   d  shows the e-mail  400  after the copied text has been pasted, where the source information, as well as the control symbols, are being displayed;  FIG. 4   e  illustrates the same e-mail after the copied text has been pasted, where the source information and the control symbols are being hidden. As mentioned above, the choice of displaying or not the source information and the control symbols, as illustrated on  FIGS. 4   d  and  4   e , respectively, can be controlled by the application display setup. For sake of illustration, the copied text is highlighted. 
         [0118]      FIG. 5  illustrates an example of a warning message  500  displayed to the user when attempting to copy a text already copied from a source document. In this example, the user, after having selected a portion of the text  505 , has invoked either the modified copy or cut function. In such case, the copied object is created as described above, but the user is also warned that he/she may infringe copyrights. 
         [0119]      FIG. 6  shows an example of accessing the source document of a copied portion of text. As illustrated, the copied text is highlighted when the user places the cursor  600  on the copied text area. Then, the user can choose to invoke the access function by different means e.g., editor tolls, menu, pop-up menu, left mouse click, or control keys. When the access function is called, a confirmation window  605  is preferably displayed, showing the path or URL extracted from the copied object associated to the copied text under the cursor position, so that the user can choose accessing or not the source document. Availability of this function is particularly useful, for example, when the source document should be accessed through a network e.g., the Internet, while the user is disconnected. 
         [0120]    Encapsulated Object Structure 
         [0121]    In a further embodiment, the encoding of the source information and copied text comprises an identifier allowing encapsulated identification of the source information. According to this embodiment, the copied object structure is as follows,
       &lt;{circle around (c)}ID href=“path or URL”; optional data {circle around (c)}&gt; copied text &lt;/{circle around (c)}ID&gt; wherein,       
 
         [0123]    &lt;{circle around (c)}marks the beginning of the header of the copied object structure; 
         [0124]    ID is the unique identifier of the copied object; 
         [0125]    href=“path or URL” encodes the path or URL of the document from which the copied text has been extracted; 
         [0126]    ; is a separator. This symbol is used only in the case where “optional data” is stored in the object along with the source information; 
         [0127]    optional data encodes additional optional source information such as the name of the author, the date of creation, and the owner of intellectual property rights of the source document; 
         [0128]    {circle around (c)}&gt; marks the end of the copied object structure header; 
         [0129]    copied text is the portion of text that has been extracted from the source document; and, &lt;/{circle around (c)}ID&gt; marks the end of the copied object structure having ID as identifier. 
         [0130]    Using a unique identifier per copied object enables to build encapsulated references, useful to trace the history of the source documents, and incidentally, to check and attribute the copyrights. For example, if a user pastes portions of text from two different source documents in a first target document and then, a second user copies the text of the first target document and pastes it into a second target document, it can be of utmost importance not only to identify the sources of each part of the text but also the source of the compilation. 
         [0131]      FIG. 7 , comprising  FIGS. 7   a  and  7   b , depicts an example of the use of the encapsulated object structure.  FIG. 7   a  shows a document  700  comprising text. Some portions of the text of document  700  have been typed by the author of such document while other portions, referred to as  705  and  710 , have been copied from two different sources, as shown encoded within the source information. Document  700  is locally stored on a computer, having the file name “test.txt” and being accessible through the full path  715 : “D:\my_documents\test.txt”. As shown on  FIG. 7   a , the copied object corresponding to the first part of copied text has a first identifier, ID1, while the copied object corresponding to the second part of copied text has a second identifier, ID2.  FIG. 7   b  depicts another document  720  wherein text imported from document  700  has been copied. As illustrated on  FIG. 7   b , a copied object has been created for the highlighted copied text  725 . The identifier of this object is different than that of the other copied objects contained within the document  720 . The path associated to this new created copied object is that of the document  700  from which the text has been copied. As a consequence, document  720  contains references not only to document  700  from which the text of document  720  has been copied but also to other documents from which portions of text were themselves copied into document  700 . 
         [0132]    The modified set of functions handling the encapsulated object structure is slightly different than the one described above. 
         [0133]    Modified Copy Function for Encapsulated Object Structure 
         [0134]    Since the encapsulated object structure comprises an identifier, it is required to determine the identifiers of the copied objects embedded within the text to be copied when creating the copied object which stores the text to be copied and the source information. As depicted on  FIG. 8  and according to the modified copy function for encapsulated object structure, the following steps are executed when this function is called after having selected the text to be copied,
       creating a copied object (step  800 );   getting the source information (step  805 );   copying the source information within the header of the created copied object (step  810 );   getting the selected text to be copied (step  815 );   determining the identifiers of the copied object that tag marking the beginning of the header is located before the selected text and that tag marking the end is located behind the selected text (step  820 ) and for each of these determined identifiers,
           inserting the header of the corresponding copied object at the beginning of the selected text (step  825 ); and,   inserting the tag marking the end of the corresponding copied object at the end of the selected text (step  830 );   
           determining the identifiers of the copied object that tag marking the beginning of the header is located before the selected text and that tag marking the end is located in the selected text (step  835 ) and for each of these determined identifiers,
           inserting the header of the corresponding copied object at the beginning of the selected text (step  840 );   
           determining the identifiers of the copied object that tag marking the beginning of the header is located in the selected text and that tag marking the end is located behind the selected text (step  845 ) and for each of these determined identifiers,
           inserting the tag marking the end of the corresponding copied object at the end of the selected text (step  850 );   
           checking if copied text portions are present in the selected text by parsing the selected text and determining if the selected text comprises tags marking the beginning and the end of a temporary computer objects (step  855 );   if copied text is found in the selected text,
           extracting the identifiers of the copied objects embedded within the selected text (step  860 );   assigning a new identifier, different than the extracted identifiers (step  865 );   
           else, if no copied text is found in the selected text, assigning an identifier (step  870 );   copying the selected text within the created copied object (step  875 ); and,   storing the created copied object with the assigned identifier into the clipboard buffer (step  880 ).       
 
         [0153]    In a further embodiment, the user is forewarned when copied text is found in the text to be copied. In such case, the source of each copied text is preferably indicated to the user, by extracting the path or URL of each copied object, as described above. 
         [0154]    Modified Paste Function for Encapsulated Object Structure 
         [0155]    The paste function is slightly modified to prevent for pasting copied objects having the same identifier as another copied object already present in the document where the text is being pasted. For this purpose, before pasting a copied object, the paste function parses the document, searching for identifiers of copied objects already present in it. If no copied object is found in the document, the paste function operated similarly to the one described above. In the case where copied objects are found in the document, the identifiers of these copied objects are compared with those of the copied object containing the text to be pasted. It should be noticed that the copied object corresponding to the text to paste may contain itself several copied objects. If one or more identifiers are identical, the common identifiers are modified so that all resulting identifiers become different. When modifying an identifier, the identifier value is changed in the copied object header and in the set of tags marking the end of the copied object structure. Once all the identifiers are different, the paste function is applied, as described above by reference to non-encapsulated copied object structure. 
         [0156]    Edit Monitoring Function for Encapsulated Object Structure 
         [0157]    As mentioned above, a background function, referred to as edit monitoring function, monitors the position of the cursor in the text in order to determine if portions of text are inserted or removed in copied text. If a portion of text is inserted or removed, the edit monitoring function checks if the cursor is positioned within copied text. To that end, the edit monitoring function checks if the cursor is located between the tags marking the beginning and the end of a same copied object structure, by checking tags and identifiers. In this case, the edit monitoring function determines all the identifiers associated to tags marking the beginning and the end of a copied object structure that are arranged on each side of the cursor. These identifiers are preferably stored in a list of identifiers. 
         [0158]    If a portion of text is removed from a copied text i.e., the list of identifiers comprises at least one identifier, the tag marking the end of the copied object structure e.g., &lt;/{circle around (c)}ID&gt;, is inserted where the portion of text has been removed. One tag is inserted for each identifier of the list of identifiers, with the corresponding identifier. Likewise, the copied object headers corresponding to the identifiers of the list of identifiers are inserted where the portion of text has been removed, after the inserted tags marking the end of the copied object structure. The inserted copied object headers comprise the tags marking the beginning and the end of the copied object structure header, with the corresponding identifier, the path or URL, and the optional data (if present). 
         [0159]    Let us consider, for sake of illustration, the following text, where the tags and the source information are apparent, This is an example of copied text, &lt;{circle around (c)}ID1 href=“C:\tmp\test1.txt”{circle around (c)}&gt; here is a &lt;{circle around (c)}ID2 href=“C:\tmp\test2.txt”{circle around (c)}&gt; copied &lt;/ID2&gt; text including several text portions &lt;/ID1&gt; &lt;{circle around (c)}ID3 href=“C:\tmp\test3.txt” {circle around (c)}&gt; from different sources by &lt;/{circle around (c)}ID3&gt;. 
         [0160]    If the word “several” of the copied text is removed, the new text, where the tags and the source information are apparent, is as follows, 
         [0000]    This is an example of copied text, &lt;{circle around (c)}ID1 href=“C:\tmp\test1.txt”{circle around (c)}&gt; here is a &lt;{circle around (c)}ID2 href=“C:\tmp\test2.txt”{circle around (c)}&gt; copied &lt;/{circle around (c)}ID2&gt; text including &lt;/ID1&gt; &lt;{circle around (c)}ID1 href=“C:\tmp\test1.txt”{circle around (c)}&gt; text portions &lt;/{circle around (c)}ID1&gt; &lt;ID3 href=“C:\tmp\test3.txt”{circle around (c)}&gt; from different sources &lt;/{circle around (c)}ID3&gt;. 
         [0161]    If a portion of text is inserted in a copied text i.e., the list of identifiers comprises at least one identifier, the tag marking the end of the copied object structure e.g., &lt;/{circle around (c)}ID&gt;, is inserted where the portion of text has been inserted, in front of the inserted portion of text. One tag is inserted for each identifier of the list of identifiers, with the corresponding identifier. Likewise, the copied object headers corresponding to the identifiers of the list of identifiers are inserted where the portion of text has been inserted, after the inserted portion of text. The inserted copied object headers comprise the tags marking the beginning and the end of the copied object structure header, with the corresponding identifier, the path or URL, and the optional data (if present). 
         [0162]    Let us consider, for sake of illustration, another example, where the tags and the source information are apparent, This is an example of copied text, &lt;{circle around (c)}ID1 href=“C:\tmp\test1.txt”{circle around (c)}&gt; here is a &lt;{circle around (c)}ID2 href=“C:\tmp\test2.txt”{circle around (c)}&gt; copied text&lt;/{circle around (c)}ID2&gt; including several text portions &lt;/ID1&gt; &lt;{circle around (c)}ID3 href=“C:\tmp\test3.txt” {circle around (c)}&gt; from different sources &lt;/{circle around (c)}ID3&gt;. 
         [0163]    If the words “and linked” are inserted after the word “copied” of the copied text, the new text, where the tags and the source information are apparent, looks like, This is an example of copied text, &lt;{circle around (c)}ID1 href=“C:\tmp\test1.txt”{circle around (c)}&gt; here is a &lt;{circle around (c)}ID2 href=“C:\tmp\test2.txt”{circle around (c)}&gt; copied &lt;/ID2&gt; &lt;/ID1&gt; and linked &lt;{circle around (c)}ID1 href=“C:\tmp\test1.txt”{circle around (c)}&gt; &lt;{circle around (c)}ID2 href=“C:\tmp\test2.txt”{circle around (c)}&gt; text &lt;/{circle around (c)}ID2&gt; including several text portions &lt;/ID1&gt; &lt;{circle around (c)}ID3 href=“C:\tmp\test3.txt”{circle around (c)}&gt; from different sources &lt;/{circle around (c)}ID3&gt;. 
         [0164]    Access Function for Encapsulated Object Structure 
         [0165]    As mentioned above, an access function is preferably provided to the user so that he/she could easily browse or retrieve the source document from which the text he/she is manipulating e.g., displaying or editing, has been copied. Such function can be activated when the cursor is located in the area of copied text by different means e.g, by clicking the pointing device in the area of copied text, by selecting the access function in a menu or a popup menu, or by using control keys. As shown on  FIG. 9 , the main steps of the access function are as follows,
       identifying copied objects comprising the copied text where the cursor is located (step  900 );   extracting the paths or URLs of the copied text from the identified copied objects (step  905 );   checking the number of identified paths or URLs (step  910 ),   if there are more than one path or URL,
           providing the choice to the user for selecting one path or URL from the identified paths or URLs (step  915 );   receiving the user&#39;s choice of the selected path or URL (step  920 );   
           else, if only one path or URL is identified, selecting this path or URL (step  925 );   accessing the source document using the selected path or URL (step  930 ); and,   displaying the source document (step  935 ).       
 
         [0175]    Displaying the source document is done according to the standard method consisting in analyzing the type of the source document e.g., according to its extension, and launching the corresponding application according to the correspondence table of the operating system. 
         [0176]    Naturally, in order to satisfy local and specific requirements, a person skilled in the art may apply to the solution described above many modifications and alterations all of which, however, are included within the scope of protection of the invention as defined by the following claims.