BACKGROUND OF THE INVENTION 
     This invention relates generally to transaction construction from electronic content. 
     There are products that use embedded web browser technology and a sophisticated graphical interface to record and playback traditional web-based transactions. Among other limitations of such systems, some do not support Wireless Application Protocol (WAP), and furthermore, others may record transactions but do not construct them. What is needed is preferably, but not limited to, a system and method for defining and executing transactions, in particular a system and method that do not require sophisticated embedded browser technology nor a graphical browser interface. Such a system and method could provide for construction of transactions and could provide for automatic execution of the operations that are part of the transactions. The system and method could be used, for example, for automatically testing communications links such as those that are part of a wireless network. 
     SUMMARY OF THE INVENTION 
     The problems set forth above as well as further and other problems are resolved by the present invention. The solutions and advantages of the present invention are achieved by the illustrative embodiments and methods described herein below. 
     The system and method of the present invention provide a mechanism for automatically defining and executing arbitrary operations that form transactions that involve content referencing, for example, across a wireless communications link. Operations can be automatically repeated as well. Furthermore, the system and method of the present invention allow changes to the rules governing content reference selection. 
     Transactions that are constructed by the present invention can be executed in any environment that provides access to content, including environments that access network-provided content through a gateway, such as, for example, General Packet Radio Service (GPRS), Circuit-switched Data (CSD), Local Area Network (LAN), and Wide Area Network (WAN). 
     For a better understanding of the present invention, reference is made to the accompanying drawings and detailed description. The scope of the present invention is pointed out in the appended claims. 
    
    
     
       DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING 
         FIG. 1  is a schematic block diagram of the environment in which the system and method of the present invention can execute; 
         FIG. 2A  is a schematic block diagram of the components of the content modifier of the illustrative embodiment of the present invention; 
         FIG. 2B  is a schematic block diagram of the components of content parser of the illustrative embodiment of the present invention; 
         FIG. 2C  is a schematic block diagram of the components of the measurement subsystem of the illustrative embodiment of the present invention; 
         FIG. 2D  is a schematic block diagram of the components of the content interface of the illustrative embodiment of the present invention; and 
         FIG. 3  is a flowchart of the method of the illustrative embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The present invention is now described more fully hereinafter with reference to the accompanying views of the drawing, in which the illustrative embodiments of the present invention are shown. 
     The following description presents an illustrative embodiment of the present invention that utilizes WAP technology in which the following definitions apply. WAP, a set of protocols analogous to industry standards HyperText Transport Protocol (HTTP) and Transport Control Protocol (TCP), is designed for wireless devices such as cell phones that have limited bandwidth, memory, screen size, etc. Wireless Markup Language (WML), a markup language conceptually similar to industry standard HyperText Markup Language (HTML), is designed for wireless devices such as cell phones that have limited bandwidth, memory, screen size, etc. Hypertext reference (href) is a well-known standard syntax for referencing documents on the internet. 
     Referring now to  FIG. 1 , system  10  of the illustrative embodiment of the present invention includes, but is not limited to, at least one content modifier  13 , at least one content parser  15 , and at least one content interface  19 , which together automatically execute at least one transaction  18 A. In the illustrative embodiment, electronic interface  21  connects system CPU  12  with at least one content provider  23  accessible, for example, from a communications network such as the internet. The at least one content provider  23  can access electronic content from any source to which it is in electronic communication such as, for example, at least one computer node  25  and at least one computer readable medium  27 . System  10  determines which content  22  to retrieve by accessing heuristics  11 , which can contain information such as, for example, at least one content locator rule  14 A and, optionally, at least one content modifier rule  14 B. 
     Continuing to refer to  FIG. 1 , system  10  executes at least one content request  18  through at least one content interface  19  and retrieves content  22 . All of the at least one content requests  18  form at least one transaction  18 A. At least one content parser  15  parses content  22  for an embedded at least one content reference  24  according to at least one content locator rule  14 A. At least one content modifier  13  may modify the embedded at least one content reference  24  according to at least one content modifier rule  14 B, and at least one content interface  19  retrieves further content  22  based on the modified at least one content reference  24 , restarting the operation cycle of at least one transaction  18 A. Optionally at least one measurement subsystem  17  can track at least one statistic  16  relevant to transaction  18 A such as, for example, the amount of time it takes to retrieve content  22 . 
     Referring now to  FIGS. 2A-2D , the major components of the illustrative embodiment of system  10  are described. Referring first to  FIG. 2A , at least one content modifier  13  can include, but is not limited to, at least one heuristics receiver  31 , at least one content reference modifier  33 , and at least one content reference provider  35 . At least one heuristics receiver  31  accesses at least one content modifier rule  14 B in order to determine how at least one content reference  24  is to be modified for the next operation of at least one transaction  18 A. At least one content modifier rule  14 B can be, for example, stored on at least one computer readable medium  27  ( FIG. 1 ) or entered manually. At least one content reference modifier  33  may modify at least one content reference  24  according to at least one content modifier rule  14 B. Content reference provider  35  prepares at least one content request  18  from at least one content reference  24  and provides at least one content request  18  to at least one content interface  19 . 
     Referring now to  FIG. 2B , at least one content parser  15  can include, but is not limited to, at least one heuristics receiver  31  and at least one reference formulator  37 . At least one heuristics receiver  31  can access at least one content locator rule  14 A from, for example, a store of heuristics  11 . At least one reference formulator  37  can parse content  22  provided by at least one content interface  19  to find at least one reference  24  within content  22  using at least one content locator rule  14 A to establish how the parsing is to proceed. At least one content reference  24  can be provided to at least one content modifier  13 . 
     Referring now to  FIG. 2C , at least one measurement subsystem can include, but is not limited to, at least one timer  41 , at least one content accessibility checker  45 , and at least one content verifier  43 . At least one timer  41  evaluates time lapse  48 A which could be retrieved from at least one statistic  16 . Time lapse  48 A can represent an operation completion time, which could be the time between when at least one content request  18  was received by at least one content interface  19 , and when content  22  was received by at least one content interface  19 . At least one content accessibility checker  45  can continuously determine accessibility count  48 B, which is a measure of how often content  22  can actually be accessed after at least one content request  18  is executed by at least one content interface  19 . At least one content verifier  43  can continuously determine content status  48 C, which is a measure of the integrity of content  22 . At least one content verifier  43  can, for example, compare content  22  to expected content  48 D. Referring now to  FIG. 2D , at least one content interface  19  can include, but is not limited to at least one content requester  51  and at least one content receiver/checker  53 . At least one content requester  51  can request content  22  from at least one content provider  23  through electronic interface  21  according to at least one content request  18  received from at least one content modifier  13 . At least one content receiver/checker  53  can receive content  22  from at least one content provider  23  through electronic interface  21  and provide content  22  to at least one content parser  15 . At least one content interface  19  can provide status information to at least one statistic  16  that can be used for later processing by at least one measurement subsystem  17 . At least one content requester  51  is capable of providing at least one statistic  16  about the at least one content request  18 , and at least one content receiver/checker  53  is capable of continuously ascertaining at least one statistic  16  related to the content  22 . 
     An example of an implementation of system  10  follows. Interaction between heuristics  11 , at least one content parser  15 , and at least one content modifier  13  could be enabled through a combined use of a content selection syntax, a data set of modification parameters and values, and an example transaction having a sequence of at least two operations that select, modify, and execute at least one content reference  24 , referred to in this section as href. At least one content provider  23  can be part of, for example, a WAP environment. The example transaction can follow a chain of hrefs, can allow modifications to each href in the chain, can allow hrefs to be named and stored for future use, and can substitute href values for their names. An operation can include, for example, (1) the downloading of content  22  such as, for example, a web page, from at least one content provider  23  on a computer network, for example, the internet, (2) the application of a set of heuristics to select an href from the downloaded content  22 , (3) the application of a set of content modifiers to the selected href, (4) the possible storage of the modified href for later use, and (5) the measurement of component steps of the operation. The heuristics of href selection and modification may be governed by special href selection syntax. The href selection syntax may be used by each operation, and the transaction can automatically substitute the value of any variable referenced within the href syntax. 
     Operationally, the example transaction typically starts with a declared href rather than one that is previously stored, to which an empty set of heuristics and modifiers have been applied. As each operation of the example transaction is executed, it produces a new href for possible use by a future operation in the same example transaction. The new href can be stored under an arbitrary name in a data store accessible to all operations in the example transaction. In the illustrative embodiment, the example transaction need not be recorded, but instead can be constructed by specifying, manually or otherwise, the operations comprising the example transaction. Each time the example transaction is executed, the operations of the example transaction are executed in sequence. Components of each operation are measured to provide meaningful data to customers. Measurements include, but are not limited to, href accessibility, time to download the href, and whether the downloaded content is valid. 
     As an example, an href-selection syntax could appear as follows: NAME:name [card={&lt;number&gt;|“text”} count=&lt;num&gt; ontimer $(var)=value]search text The elements of the href selection syntax could include, but would not be limited to, the following:
         (a) NAME:name. This entry can associate name with a selected href for the duration of the transaction.   (b) href-selection modifiers, enclosed in brackets [ ]. The modifiers could be optional, but brackets can be required when modifiers are used.
           (1) The card=modifier can limit href selection to a specific card within a WML deck. The choices can be indicated by braces { } and |:
               (i) card=&lt;number&gt; can select a card by number; for instance, card=2 can limit the search for an href to the second card in the deck.   (ii) card=“text” can limit the search for an href to the card in the deck whose identification or title string exactly matches text.   
               (2) The count=modifier can indicate a specific address or anchor element within a card (or within the deck, if no card is specified). count=1 can indicate the first such element, count=2 can indicate the second, etc.   (3) The ontimer modifier can require a card=modifier and no search text. It can select the href associated with a card&#39;s ontimer attribute (or the card&#39;s onevent type=“ontimer” element).   (4) $(var)=value. This modifier, which can be optional, may not be used to select an href, but can be applied to the selected href. It can perform a case-sensitive string match, and can substitute value for the first occurrence of the string $(var) found in the selected href. Multiple instances of this modifier can be allowed.   
           (c) search text. This is text that can be directly associated with a WML &lt;a&gt; or &lt;anchor&gt; element. For example, it might be text found between an &lt;a&gt; and its corresponding &lt;/a&gt; in the WML content. search text can be case-sensitive, and can be made to match a substring of the directly-associated text.
 
An example WML deck could appear as follows:
       

     
       
         
               
             
           
               
                   
               
             
             
               
                 &lt;wml&gt; 
               
               
                  &lt;card id= “splash” title= “timer” ontimer= “#main”&gt; 
               
               
                   &lt;timer value= “1”/&gt; 
               
               
                   &lt;/card&gt; 
               
               
                  &lt;card id= “main” title= “myWapSite”&gt; 
               
               
                   &lt;p&gt;&lt;a href= “http://wap.myWapSite.org”&gt; My WAP site &lt;/a&gt;&lt;/p&gt; 
               
               
                   &lt;/card&gt; 
               
               
                  &lt;card id= “business” title= “blind”&gt; 
               
               
                   &lt;p&gt;&lt;a href= “http://wap.hooray.org”&gt; My hooray &lt;/a&gt;&lt;/p&gt; 
               
               
                    &lt;p&gt;&lt;a href= “http://wap.lastHooray.com/wml”&gt; Last hooray 
               
               
                 &lt;/a&gt;&lt;/p&gt; 
               
               
                    &lt;p&gt;Your horoscope for today: 
               
               
                    &lt;a href = “http://wap.horoscope.com/index.wml”&gt; click here 
               
               
                 &lt;/a&gt;&lt;/p&gt; 
               
               
                    &lt;/card&gt; 
               
               
                   &lt;card id= “horo” title= “scope”&gt; 
               
               
                    &lt;p&gt;Pisces 
               
               
                    &lt;a href= “http://wap.horoscope.com/pisces.wml”&gt; click here 
               
               
                 &lt;/a&gt;&lt;/p&gt; 
               
               
                    &lt;p&gt;Libra 
               
               
                    &lt;/card&gt; 
               
               
                   &lt;a href=“http://wap.horoscope.com/libra.wml”&gt;click here&lt;/a&gt;&lt;/p&gt; 
               
               
                   &lt;/card&gt; 
               
               
                  &lt;card id=“weather”&gt; 
               
               
                    &lt;p&gt;Zip Code: 
               
               
                   &lt;input type=“text” name=“zp” value=“” format=“5N”/&gt; 
               
               
                   &lt;a title=“OK” href=“http://wap.weather.org/ 
               
               
                   gett?zz=$(zp)”&gt;Submit&lt;/a&gt; 
               
               
                   &lt;/p&gt; 
               
               
                  &lt;/card&gt; 
               
               
                 &lt;/wml&gt; 
               
               
                   
               
             
          
         
       
     
     [card=“blind”]hooray—This expression limits the href selection to the card whose ID or title is blind. Within that card, the element whose directly-associated text contains hooray is located. In this example, there are two such entries; the first one is chosen by default, and the selected href is http://wap.hooray.com. 
     [card=“blind”]LAST hooray—This expression limits the href selection to the card whose ID or title is blind. Within that card, the element whose directly-associated text contains LAST hooray is located. The search is case-sensitive, and fails to find a matching entry. 
     [card=“business” count=2]hooray—This expression limits the href selection to the card whose ID or title is business. Within that card, the element whose directly-associated text contains hooray is located. There are two such entries; count=2 chooses the second entry, and the selected href is http://wap.lastHoorah.com/wml. 
     [count=3]click here—This expression finds the third element in the WML deck whose directly-associated text contains click here. http://wap.horoscope.com/libra.wml is selected. 
     [card=‘scope’]Pisces—This expression limits the href selection to the card whose ID or title is scope, the fourth card. However, the expression fails because there is no element whose directly-associated text contains Pisces. The string Pisces is present in the card, but is independent of an &lt;a&gt; or &lt;anchor&gt; element. 
     [card=1 ontimer]—This expression selects #main, the href associated with the ontimer element of the first card. #main is a deck-relative href indicating the second card in the current deck. The current deck is already present, so should not be reloaded. Notice that there is no search text when the ontimer modifier is used. 
     site—This expression has no modifiers, so selects the first href in the deck whose directly-associated text contains site. http://wap.myWapSite.org is selected. 
     [card=‘weather’ $zp=12345 $(zp)=80528]Submit—This expression limits the href selection to the card whose ID or title is weather. Within that card, the element whose directly-associated text contains Submit is located. The selected href is http://wap.weather.org/gett?zz=$(zp), but there are post-selection modifiers to apply to it. The literal string $zp does not exist in the href, so that modifier is ignored. The literal string $(zp) exists in the href, so its value is substituted. The final selected href is http://wap.weather.org/gett?zz=80528. 
     This next and final example illustrates use of the NAME feature of the href selection syntax. 
                                             wap operation #1             href = http://wap.startingURL.com             href_select = NAME:nextUrl [card= ‘business’] click here           wap operation #2             href = $(nextUrl)                        
In this example, WAP operation #1 downloads WML content, extracts an href from that content, and makes that href available to WAP operation #2. WAP operation #1 may specify an href and may also specify an href_select property with a NAME component. If WAP operation #1 downloads the WML deck described above, href_select can select the href, http://wap.horoscope.com/index.wml, and may assign it the name nextUrl. This assignment can last for the duration of the example transaction. WAP operation #2 also specifies an href by referencing the named href using the syntax $(&lt;name&gt;), for example $(nextUrl). The example transaction may then automatically substitute the value, http://wap.horoscope.com/index.wml, before executing the operation.
 
     Referring now to  FIG. 3 , method  20  of the illustrative embodiment of the present invention includes, but is not limited to, the steps of initializing time lapse  48 A, accessibility count  48 B, content status  48 C, and at least one content reference  24  (method step  71 ), and requesting content  22  according to at least one content reference  24  (method step  73 ). If at least one content interface  19  ( FIG. 2D ) is able to access content  22  (decision step  75 ), method  20  includes the steps of recording the time required for the access, time lapse  48 A, and resetting the value of time lapse  48 A (method step  79 ). If content interface  19  ( FIG. 2D ) is not able to access content  22  (decision step  75 ), method  20  includes the steps of resetting time lapse  48 A, incrementing accessibility count  48 B (method step  77 ), and requesting more content  22  (method step  73 ). If there is an error in content  22  (decision step  81 ), method  20  includes the steps of resetting time lapse  48 A, incrementing content status  48 C (method step  82 ), and requesting more content  22  (method step  73 ). If there is no error in content  22  (decision step  81 ), and the at least one transaction  18 A is complete (decision step  83 ), method  20  is complete. If there is no error in content  22  (decision step  81 ), and the at least one transaction  18 A is not complete (decision step  83 ), method  20  includes the steps of getting heuristics  11  (method step  85 ), locating at least one content reference  24  according to heuristics  11  (method step  87 ), updating at least one content reference  24  according to heuristics  11  (method step  89 ), and requesting more content  22  (method step  73 ). 
     Method  20  can be, in whole or in part, implemented electronically. Signals representing actions taken by elements of system  10  can travel over electronic communications media. Control and data information can be electronically executed and stored on computer-readable media, such as computer readable medium  27 . The system can be implemented to execute on at least one node  25  in communications network  23 A. Common forms of computer-readable media include, for example, a floppy disk, a flexible disk, a hard disk, magnetic tape, or any other magnetic medium, a CDROM or any other optical medium, punched cards, paper tape, or any other physical medium with patterns of holes, a RAM, a PROM, and EPROM, a FLASH-EPROM, or any other memory chip or cartridge, a carrier wave, or any other medium from which a computer can read. 
     Although the invention has been described with respect to various embodiments and methods, it should be realized that this invention is also capable of a wide variety of further and other embodiments and methods within the spirit and scope of the appended claims.
A system and method for constructing transactions by requesting content from content providers, such as web sites, according to automatically generated content references. From that content and according to user-defined rules, the system can generate other content references, and request and access further content. Statistics can be maintained for each content access. The system and method can be used to test electronic networks, such as wireless communications networks.