Index creating apparatus

An index creating apparatus for creating indexes of documents displayed on display means, said index creating apparatus comprising:

• analyzing means for analyzing a format of an index word from an input document and for explaining the index word;
• first display control means comprising:
• registering means for registering a specified portion of a document which is displayed on said display means as the index word,
• canceling means for canceling the specified portion of the document which is displayed on said display means and registered as the index word, and
• retrieving means for retrieving a specified index word from registered index words,
• said first display control means displaying the input document on the display means together with the portion corresponding to the index word, so that the portion corresponding to the index word is displayed differently from other portions of the input document;
• storage means for storing information related to the registered index words;
• and
• filling means for obtaining an output document by filling the index word into the input document with a predetermined format and outputting the output document.