CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of and claims priority under 35 U.S.C. §120 to U.S. application Ser. No. 14/472,657, titled “METHOD AND SYSTEM FOR PROCESSING PUBLISHED CONTENT ON THE INTERNET, filed on Aug. 29, 2014, which is a continuation of U.S. application Ser. No. 14/136,490, titled “METHOD AND SYSTEM FOR PROCESSING PUBLISHED CONTENT ON THE INTERNET,” filed on Dec. 20, 2014 and issued as U.S. Pat. No. 8,868,691, which is a continuation of U.S. application Ser. No. 13/523,241, titled “METHOD AND SYSTEM FOR PROCESSING PUBLISHED CONTENT ON THE INTERNET,” filed on Jun. 14, 2012 and issued as U.S. Pat. No. 8,621,048, which is a continuation of U.S. application Ser. No. 12/480,996, titled “METHOD AND SYSTEM FOR PROCESSING PUBLISHED CONTENT ON THE INTERNET,” filed on Jun. 9, 2009 and issued as U.S. Pat. No. 8,239,494, which is a continuation of U.S. application Ser. No. 10/999,490, titled “METHOD AND SYSTEM FOR PROCESSING PUBLISHED CONTENT ON THE INTERNET,” filed on Nov. 30, 2004 and issued as U.S. Pat. No. 7,640,182. The disclosure of each of the foregoing applications is incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to an automated method and system of processing that allows publishers of on-line content to enhance and modify the content so that the feeds of the content provide useful information to the publisher as well as process the feed so as to provide the customer non-duplicative feeds. 
     BACKGROUND OF THE INVENTION 
     The Internet community consists of many on-line publishers. These entities and individuals publish various content and other items on-line for Internet users to read and download. A common example of an Internet publication is a news service web site. In addition, BLOGS also have become an extremely popular form of on-line publishing. 
     In many instances, the on-line publisher will syndicate its materials. On-line publishers generally have long known of and used on-line syndication. On-line syndication essentially consists of on-line publishers providing their content to third parties. The third parties provide access to the content via other channels, effectively reaching a wider audience. Many publishers enable daily emails to Internet users who wish to receive “headlines” or other new items. Moreover, many of these services regularly update the site, service and/or content with new items. Some of these sites even alert users when the publisher has updated the site. In this manner, readers of the content can enjoy fresh, updated content on a regular basis, without the need for the user to go back to the web site every time it would like to refresh the content. 
     On-line publishers use various tools in publishing the material on the Internet. For example, RSS and ATOM constitute the most common forms of a syndication standard. RSS is based on XML, a widely used standard for information exchange between applications on the Internet. ATOM is another standard. These standards allow publishers to send “feeds” around the Internet, particularly to aggregators. Consumers obtain RSS reader applications, which work with the aggregator software, to receive, collect and monitor their favorite feeds. 
     Many publishers distribute the feeds to Internet users for free. As such, publishers seek to obtain revenue from third party materials, such as advertisements, that publishers associate with the published content. For example, a publisher of a sports feed may seek to have a gym shoe manufacturer pay to place an advertisement on the feed so that when a user reviews the content, the user also will see the ad. Publishers have used this form of Internet advertising for a long time and it is a well established source of revenue. 
     To maximize the revenue, the publisher often will “rotate” the advertisements. In other words, three different users looking at the same feed item may see three different advertisements. In this manner, the publisher can receive credit for three different “hits” or “eye balls” on the same content. 
     The biggest challenge with respect to advertisements is being able to rotate the ads without repeating the content. In particular, as noted above, many of the sites regularly update with new content. With each new story, the advertiser can rotate the ads and maximize fees. However, the problem occurs when the advertiser wants to rotate the ads, but keep the content the same. For example, when a user receives some type of alert or notification, for example, a ping, instant message email or some other type of notice that a publisher has updated a site with a new content, the user assumes that he or she will read a new story; but, often, the user receives a false message. Specifically, because the publisher tries to maximize advertisements, the publisher will rotate the ads on an old story. This action often results in an unintended alert to the user. In such cases, the user merely sees the same, previously viewed content, but with new advertisements. This skews advertising scoring and limits the amount of additional services that can be provided to the syndicated feed because of the limitation on the rotating of the advertisements. In other words, the advertiser cannot get an accurate statistical count or determine user profiles because the story has not changed, but only the advertisement, and therefore it is not possible to determine the users preference. Moreover, users often become frustrated and annoyed by such situations and publishers risk alienating clients by ad rotation; however, publishers depend on attaching as many advertisements to content as possible to augment revenue. 
     SUMMARY OF THE INVENTION 
     The present invention provides a unique, novel system whereby the invention permanently associates third party or advertising content to a particular feed item. Initially, a publisher of on-line content will create a RSS or ATOM XML file for the feed (but other formats may be used). The system of the present invention, acting as an aggregator, will process the feed. Specifically, in one of the embodiments of the present invention, the publisher will provide the URL for the publisher&#39;s valid RSS or ATOM XML file, or, the publisher will provide a URL for a webpage that contains a link to the publisher&#39;s valid RSS or ATOM file. In the latter case, acting as an aggregator, the invention will visit the webpage and attempt to “autodiscover” the RSS or ATOM URL. The invention then retrieves the feed that is located at this URL, and determines whether or not it is a valid RSS or ATOM XML file. If the source feed is valid, the system contacts the publisher and offers the publisher a variety of services which the invention can perform with respect to enhancing the feed. Such services include merging feeds of downloadable music files into news feeds, feed-driven advertising banners, language translation, and providing other services around rich media in feeds. 
     Once the system performs any services selected by the publisher on the feed, in this embodiment of the invention, it will then provide the publisher with a URL for the augmented feed. The augmented feed is the result of the execution of the publisher selected services on the source feed. 
     In addition, the invention will permanently associate the third party content with a feed item. In this manner, the invention prevents the advertisement rotation problem. The invention does this by parsing out the particular feed items and either: (a) identifying a unique identifier to each feed item; or (b) attaching the unique identifier to each feed item. If the invention has previously associated third party content with the item identified by the unique identifier, then the previously stored third party content is appended to the XML item in the feed. If the invention has not previously associated third party content with the item identified by the unique identifier, then the invention creates an association between the third party content and unique identifier, stores the associated content or a reference to the associated content in a file, and then appends the third party content to the XML item in the feed. This process is repeated until there are no more items in the feed to process. 
     When this process is complete, the invention outputs an augmented feed and provides the publisher with a unique URL that refers to the augmented XML feed. This augmented feed contains all the permanent associations between third party content and the items in the feed. The user often will receive an alert with respect to the feed. Subsequently, as the source feed is modified or extended, the permanent relationships between third party content and previously existing feed items are retained, even with respect to the updated feed for which users receive new alerts. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a shows a functional block diagram of the basic components of the present invention. 
         FIG. 2  is a schematic diagram which outlines the basic components of an RSS feed. 
         FIG. 3  shows an illustrative process of how a publisher creates content for publication. 
         FIG. 4  shows a flow chart demonstrating how a feed item is processed by the RSS aggregator or system of the present invention. 
         FIG. 5  is a flow chart demonstrating one process in which the system maintains and updates this augmented. 
         FIG. 6  shows a flow chart illustrating how the to associate third party content with a feed item. 
         FIG. 7  shows a flow chart illustrating how a feed item receives a unique identifier. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows a functional block diagram of the basic components  10  of the present invention.  FIG. 1  shows a publisher  12  which produces content  14  for display via the publishers web site  16 . The publisher also provides an RSS feed  118 . The RSS feed  18  is provided to an RSS aggregator or system  20  of the present invention. The system  20  of the present invention processes the RSS feed and develops an output to the publisher and an output to various RSS readers  22 . 
       FIG. 2  is a schematic diagram which outlines the basic components of an RSS feed  18 . The RSS feed  18  includes a channel  24  having a title  26 , description  28 , URL  30 , and creation date  32 . The RSS feed  18  also includes one or more items  34 . Each item  34  may include a title  36 , description  38  and URL  40 . The RSS feed  18  may include other components as is known in the art. 
       FIG. 3  shows an illustrative process of how a publisher  12  creates content  14  for publication via the web site  16 , and an RSS or ATOM document or feed  18  for syndication. Of course formats other than RSS or ATOM will also be appreciated. The RSS feed  18  will be used in communication with the RSS aggregator or system  20  of the present invention as described below. 
     The publisher creates or provides content  14  at step  44  and stores the content  14  in a database at step  46 . The publisher  12  then publishes the content  14  at step  48  and applies an HTML template at  50  to the content  14 . The publisher  12  then assigns a URL and saves to a disk at  52 . The end result is an HTML document as shown at step  54 . The HTML document is viewable at the publishers web site  16  at the corresponding URL. If the publisher also desires to syndicate the content  14 , then the publisher also applies an RSS template at  56 . The publisher  12  then assigns a URL and saves to a disk at  58 . The end result is an RSS document or feed  18  as shown at step  60 . It should be understood that the preceding represent examples for illustrative purposes and there are other ways to practice the invention. 
       FIG. 4  shows a flow chart of a series of steps which may be carried out by software under the control of the system  20 . The publisher visits a website or other access point of the system  20  and registers, as shown at  64 . The system  20  then provides at  66  a web based form on the web site and prompts for an RSS feed  18 . At step  68 , the publisher  12  may either provide a URL for a valid RSS or ATOM XML file, or provide a URL for a webpage that contains a link to a valid RSS or ATOM URL. If the publisher chooses the later, the invention will visit the webpage and attempt to “autodiscover” the valid RSS or ATOM URL. The RSS file  18  which is located at this URL is then retrieved at step  70  and confirmed to be valid. If the feed  34  is valid, the system  20  then provides a second form at  72 . The second form lists the various enhancement and transformation services that the system  20  is able to execute on the source feed  18 . The services include merging feeds of downloadable music files into news feeds, feed-driven advertising banners, language translation, and providing other services around rich media in feeds, as examples. The publisher  12  can then choose various enhancement and transformation services to apply to the feed  18  as shown at  74 . Once the publisher has selected all the services, these services are applied to the feed  34  at step  76 , whereby the feed  18  becomes an augmented feed as provided at step  78 . At step  80 , the system provides the publisher  12  with a selection of “Publicize” options that provide the publisher with various ways of alerting subscribers to the availability of the augmented feed. These publicized options include but are not limited to web-based graphics that contain links to the URL for the augmented feed, html text that contains contain links to the URL for the augmented feed and other graphics and html that promote the existence of the augmented feed. Finally, the publisher  12  may then use any of the publicized options on a website  16  to promote the existence of the augmented feed, or the publisher  12  may promote the existence of the augmented feed in other ways. 
     Once a publisher  12  has created an augmented feed through the system  20 , the system  20  maintains and updates this augmented feed as shown in  FIG. 5 . The system  20  maintains a database relationship between the publisher&#39;s RSS feed  18  and the system&#39;s augmented feed. The first time a publisher creates an augmented feed, a copy of the RSS feed  18  is stored within the system  20 , so that future checks of the source feed can be compared against this stored copy to check for updates. In particular, the process  86  includes an initial step  88  of creating a unique identification for the item  34  in the feed  18 . The step  88  is described in greater detail below. At  90 , the system  20  extracts the content from the item  34 . At step  92 , the system checks if the content is stored in cache of the system  20 . If the content is not stored in cache, at  94 , the system  20  stores the content or hash in cache. At  96 , the system then returns a result indicating a content change. If the system  20  determines at  92  that the content is not stored in cache, the system retrieves content from the cache. The retrieved content is compared to the new content at  100 . If there is a difference, the system again returns a result indicating a content change at  96 . If the content is not different, at  110 , the system returns a result indicating no change in content. 
     There are two ways in which the system  20  can make sure that the augmented feed is up to date. In the first instance, the system will retrieve the source feed every 30 minutes on a continual basis, and if the source feed has been updated since the last time the system checked, the system replaces the source feed it has stored with this new updated source feed. In the other instance, the publisher can implement the publicly available XML-RPC ping interface. This interface is a mechanism that causes the publisher&#39;s source feed to notify the system whenever it has been updated. In the case in which the publisher implements the XML-RPC interface, the system will always retrieve and update the stored copy of the source feed whenever a notification is received. 
     Once the source feed is updated, the system performs all of the augmentation services selected by the publisher against the source feed, and updates its stored version of the augmented feed (aka “The cached version of the augmented feed”) 
     The very first time an HTTP request is made for the augmented feed (typically a subscriber to the publisher&#39;s augmented feed asking to read it), the system retrieves its copy of the source feed, performs all of the publisher selected services against the source feed, and sends a copy of the augmented feed in response to the HTTP request. A copy of the augmented feed is then stored (aka cached), and this cached version of the augmented feed is then used to service all subsequent HTTP requests for the augmented feed until the system determines that the augmented feed needs to be updated, based on updates to the source feed. 
     In this embodiment of the present invention, a number of steps are required in order to permanently associate third party content with a feed item  64 . As seen in  FIG. 6 , in step  114  in the process, the feed  34  is read and parsed to begin the process of associating third party content with the feed items  64 . In the next step  116 , a unique item identifier  70  is retrieved for the particular feed item  64 . 
     The method for the retrieval of a unique item identifier  70  is demonstrated most clearly in  FIG. 7 . The first step  130  in the process is to obtain the feed item  64 . Next, it is determined whether the feed item  64  has a unique item identifier  70  at  132 . If a unique item identifier  70  has been embedded in the feed item  64 , the unique item identifier  70  is identified with the corresponding feed item  64  as the unique item identifier  70  at step  134 . 
     Continuing in  FIG. 7 , if there is no unique item identifier  70 , then the next step  136  is to determine whether the feed item  64  has a link XML element  80 . Generally speaking, the link  80  is the XML tag for a URL of the feed item  64  being syndicated. 
     If the feed item  64  has a link XML element  80 , at step  138 , the link element  80  will be hashed, the result of which is the assignment of the unique item identifier  70  of the feed item  64 . While there are varying ways to hash an item, a commonly understood method for hashing includes taking the feed item  64  and applying a publicly understood “secure hash algorithm” to obtain a fixed-length message digest. This digest is then Base64 encoded (a common content-transfer encoding method) to make it suitable for storing in a text-based field. This act results in a “hashcode” that will be a unique item for the source item. 
     If the feed item  64  has no link XML element  80 , at step  140  in  FIG. 7 , it will then be determined if the feed item  64  has a summary XML element  86 . A summary XML element  86  is commonly understood to mean a “short summary of the item being syndicated.” If it is determined at step  140  that the feed item  64  has a summary XML element  86 , it will be hashed at step  142 , the result of which is the assignment of a unique item identifier  70  for the feed item  64 . 
     If the feed item  64  has no summary XML element  86 , in step  144  of  FIG. 7 , it will be determined if the feed item  64  has a body XML element  92 . A body XML element  92  is commonly understood to mean the full body of the item being syndicated. This is generally a rich html formatted version of the contents that can be found on the web site address identified by the URL in the link tag. Note that in some cases, the full contents of the web site are not syndicated in the body, generally in cases where the publisher does not desire to syndicate the full contents, but rather desires to syndicate portions of content so that subscribers return to the web site for the full information. It is up to the discretion of the publisher as to how much of the web site contents are syndicated in the body. If is determined at step  144  that the feed item  64  has a body XML element  92 , it is hashed at step  94 , the result of which is assigned to be the unique item identifier  70  of the feed item  64  at step  146 . 
     If the feed item  64  has no body XML element  92 , at step  148 , the pubDate XML element  98  is assigned as the unique item identifier  70  for the feed item  64 . The pubDate XML element  98  is commonly understood as the date the item was published in some content publishing tool like a weblog engine, expressed in either some standard electronic format, such as either the RFC822 or ISO8601 standard date formats, but other formats may apply. 
     Step  150  represents the unique identifiers as obtained from any one of steps  134 ,  138 ,  142 ,  146  or  148 . 
     Returning to  FIG. 6 , in this embodiment of the present invention, it is now determined whether there exists previously associated third party content with the feed item  64  as shown in step  118 . If the unique item identifier  70  already has associated third party content, then the previously stored third party content is appended to the item  64  as shown at  120 . If the third party content does not exist, at step  122 , the third party content is created and stored  124  briefly. Ultimately, this stored third party content is appended to the feed item  64  at step  120 . The entire process set forth in  FIG. 6  is repeated until there are no more feed items  64  to process as determined at step  126 . 
     In this embodiment, as shown in  FIG. 6 , after determining there are no more feed items  64  to process at step  108 , an augmented feed is produced at step  128 . This augmented feed contains all the permanent associations between third party content and the feed items  64 . Moreover, as the feed  34  is modified or extended by the publisher, the permanent relationships between third party content and previously existing feed items  64  are retained.
Disclosed is a method for processing content published on-line so as to identify each item in a unique manner. In some implementations, an RSS feed is received from a publisher and a unique identifier is identified for each item in the feed. Each item then has third party content or advertisements associated with the item based on the unique identifier. The feed is then stored and, when appropriate, updated. The augmented feed, which contains the third party content and the items in the feed, is provided to user devices.