NAME

RiveScript - Rendering Intelligence Very Easily

SYNOPSIS

use RiveScript;

# Create a new RiveScript interpreter.
my $rs = new RiveScript;

# Define a macro.
$rs->setSubroutine (weather => \&weather);

# Load in some RiveScript documents.
$rs->loadDirectory ("./replies");

# Load in another file.
$rs->loadFile ("./more_replies.rs");

# Stream in yet more replies.
$rs->stream ('! global split_sentences = 1');

# Sort them.
$rs->sortReplies;

# Grab a response.
my @reply = $rs->reply ('localhost','Hello RiveScript!');
print join ("\n",@reply) . "\n";

DESCRIPTION

RiveScript is a simple input/response language. It is simple, easy to learn, and mimics and perhaps even surpasses the power of AIML (Artificial Intelligence Markup Language). RiveScript was initially created as a reply language for chatterbots, but it has also been used for more complex things above and beyond that.

RiveScript was originally known as Alpha but was reprogrammed to add more flexibility and power to it. While their syntaces are similar, Alpha code is not entirely compatible with RiveScript.

PUBLIC METHODS

new

Creates a new RiveScript instance. Pass in any defaults here.

setSubroutine (OBJECT_NAME => CODEREF)

Define a macro (see Object Macros)

loadDirectory ($DIRECTORY[, @EXTS])

Load a directory of RiveScript files. EXTS is optionally an array of file extensions to load, in the format (.rs .txt .etc). Default is just ".rs"

loadFile ($FILEPATH[, $STREAM])

Load a single file. Don't worry about the STREAM argument, it is handled in the stream() method.

stream ($CODE)

Stream RiveScript code directly into the module.

sortReplies

Sorts the replies. This is ideal for matching purposes. If you fail to do so and just go ahead and call reply(), you'll get a nasty Perl warning. It will sort them for you anyway, but it's always recommended to sort them yourself. For example, if you sort them and then load new replies, the new replies will not be matchable because the sort cache hasn't updated.

reply ($USER_ID, $MESSAGE[, %TAGS])

Get a reply from the bot. This will return an array. The values of this array would be all the replies (i.e. if you use {nextreply} in a response to return multiple).

%TAGS is optionally a string of special reply tags, each value is a boolean (1 or 0, all default to 0):

scalar   -- Forces a scalar return of all replies found. The method
            will return a scalar rather than an array.
no_split -- Ignore sentence-splitting when going into the reply.
            This is for special cases such as ";-)" (winking emoticon)
            where it is unmatchable because ; is a sentence-splitter.

retry    -- You should NEVER set this argument. This is used internally
            so the module knows it's on a retry run (if a reply isn't
            found, it tries again but sets no_split to true).

search ($STRING)

Search all loaded replies for every trigger that STRING matches. Returns an array of results, containing the trigger, what topic it was under, and the reference to its file and line number.

write ([$FILEPATH])

Outputs the current contents of the loaded replies into a single file. This is useful for if your application dynamically learns replies by editing the loaded hashrefs. It will write all replies to the file under their own topics... i.e. perfectly functional code. Comments and other unnessecary formatting is ignored, because the module doesn't pay attention to them at loading time anyway.

The default path is to "written.rs"

See "DYNAMIC REPLIES".

setGlobal (VARIABLE => VALUE, ...)

Set a global variable directly from Perl (alias for ! global)

setVariable (VARIABLE => VALUE, ...)

Set a botvariable (alias for ! var)

setSubstitution (BEFORE => AFTER, ...)

Set a substitution setting (alias for ! sub)

setUservar ($USER_ID, VARIABLE => VALUE, ...)

Set a user variable (alias for <set var=value>)

getUservars ([$USER_ID])

Get all uservars for a user. Returns a hashref of the variables. If you don't pass in a $USER_ID, it will return a hashref of hashrefs for each user (first level being their ID, second level being their variables).

SECURITY METHODS

The RiveScript interpreter (a la the Perl script) can specify some security settings as far as what a RiveScript file is allowed to contain.

denyMode (MODE)

Valid modes are deny_some, allow_some, and allow_all. allow_all is the default. Use the deny() and allow() methods complementary to the denyMode specified.

deny (COMMANDS)

Add COMMANDS to the denied commands list. These can be single commands (one character) or beginnings of command texts. Examples:

$rive->deny (
  '&',
  '! global',
  '! var copyright',
  '> begin',
  '< begin',
  '> __begin__',
  '< __begin__',
);

In that example, &PERL, !GLOBAL, and the BEGIN statement (as well as the internal names for the BEGIN statement's topic) would be disallowed in the RiveScript documents loaded in. It would also disallow the RiveScript documents to (re)define a variable named "copyright"

allow (COMMANDS)

Add COMMANDS to the allowed commands list. For the highest security, you'd want to allow_some commands rather than deny_some. This method is to be used with that mode of denial.

$rive->allow (
  '+',
  '-',
  '! var',
  '@',
);

That example would deny EVERY command except for triggers, responses, botvariable setters, and redirections.

PRIVATE METHODS

These methods are called on internally and should not be called by you.

debug ($MESSAGE)

Print a debug message.

makeParser

Creates a RiveScript::Parser instance, passing in the current data held by RiveScript. This call is made before using the parser, and the object is destroyed when it is no longer needed (to save on memory usage).

intReply ($USER_ID, $MESSAGE)

This should not be called. Call reply instead. This method assumes that the variables are neatly formatted and may cause serious consequences for passing in badly formatted data.

splitSentences ($STRING)

Splits string at the sentence-splitters and returns an array.

formatMessage ($STRING)

Formats the message (runs substitutions, removes punctuation, etc)

mergeWildcards ($STRING, $ARRAY)

Merges the values from ARRAY into STRING, where the items in ARRAY correspond to a captured value from $1 to $100+. The first item in the array should be blank; there is no such thing as a <star0>.

stringUtil ($TYPE, $STRING)

Called on for string format tags (uppercase, lowercase, formal, sentence).

FORMAT

RiveScript documents have a simple format: they're a line-by-line language. The first symbol(s) are the commands, and the following text is typically the command's data.

In its most simple form, a valid RiveScript entry looks like this:

+ hello bot
- Hello human.

RIVESCRIPT COMMANDS

The following are the commands that RiveScript supports.

! (Definition)

The ! command is for definitions. These are one of the few stand-alone commands (ones that needn't be part of a bigger reply group). They are to define variables and arrays. Their format is as follows:

! type variable = value

type     = the variable type
variable = the name of the variable
value    = the variable's value

The supported types are as follows:

global  - Global settings (top-level things)
var     - BotVariables (i.e. the bot's name, age, etc)
array   - An array
sub     - A substitution pattern
person  - A person substitution.
addpath - Add an include path
include - An include method
syslib  - Include a Perl module globally

Some examples:

// Set global vars
! global debug = 1
! global split_sentences = 1
! global sentence_splitters = . ! ; ?

// Setup a handler for macro failures.
! global macro_failure = <b>ERROR: Macro Failure</b>

// Set bot vars
! var botname   = Casey Rive
! var botage    = 14
! var botgender = male

// Some substitutions
! sub can't = can not
! sub i'm   = i am

// Person substitutions
! person i   = you
! person you = me
! person am  = are
! person are = am

// Add a path to find libraries.
! addpath C:/MyRsLibraries

// Include a library of arrays
! include English/EngVerbs.rsl

// Include a package of objects
! include DateTime.rsp

For objects which use Perl modules, you can use !syslib to include the module global to RiveScript to save on memory.

! syslib LWP::Simple

Note: For arrays, you can have multi-word items if you separate the entries with a pipe ("|") symbol rather than a space.

Note: To delete a variable, set its value to "undef" and its internal hashref key will be deleted altogether.

< and > (Label)

The < and > commands are for defining labels. A label is used to treat a part of code differently. Currently there are three uses for labels: begin, topic, and object. Example usage:

// Define a topic
> topic some_topic_name

  // there'd be some triggers here

< topic
// close the topic

+ (Trigger)

The + command is the basis for all triggers. The + command is what the user has to say to activate the reply set. In the example,

+ hello bot
- Hello human.

The user would say "hello bot" only to get a "Hello human." back.

% (Previous)

The % command is for drawing a user back to complete a thought. You might say it's sort of like <that> in AIML. Example:

+ ask me a question
- Do you have any pets?

+ yes
% do you have any pets
- What kind of pet?

// and so-on...

The % command is like a +Trigger but for the bot's last reply. The same substitutions that are applied to the user's messages are applied to the bot's reply.

! sub who's = who is

+ knock knock
- Who's there?

+ *
% who is *
- {sentence}<star> who?{/sentence}

+ *
% * who
- Ha! {sentence}<star>!{/sentence} That's hilarious!

- (Response)

The - command is the response. The - command has several uses, depending on its context. For example, in the "hello bot/hello human" example, one + with one - gets a one-way question/answer scenario. If more than one - is used, a random one is chosen (and some may be weighted). There are many other uses that we'll get into later.

^ (Continue)

The ^Continue command is for extending the previous command down a line.

The commands that can be continued with ^Continue:

! global
! var
! array
+ trigger
% previous
- response
@ redirection

Sometimes your -REPLY is too long to fit on one line, and you don't like the idea of having a horizontal scrollbar on your text editor. The ^ command will continue on from the last -REPLY. For example:

+ tell me a poem
- Little Miss Muffit sat on her tuffet\s
^ in a nonchalant sort of way.\s
^ With her forcefield around her,\s
^ the Spider, the bounder,\s
^ is not in the picture today.

Here are some examples of the other uses of ^Continue:

! array colors  = red blue green yellow cyan fuchsia
^ white black gray grey orange pink
^ turqoise magenta gold silver

! var quote = How much wood would a woodchuck
^ chuck if a woodchuck could chuck wood?

+ how much wood would a woodchuck\s
^ chuck if a woodchuck could chuck wood
- A whole forest. ;)

+ how much wood
@ how much wood would a woodchuck\s
^ chuck if a woodchuck could chuck wood

@ (Redirect)

The @ command is for directing one trigger to another. For example, there may be complicated ways people have of asking the same thing, and you don't feel like making your main trigger handle all of them.

+ my name is *
- Nice to meet you, {formal}<star1>{/formal}.

+ people around here call me *
@ my name is <star1>

Redirections can also be used inline. See the "TAGS" section for more details.

* (Conditions)

The * command is used for checking conditionals. The format is:

* variable = value => say this

For example, you might want to make a condition to differentiate male from female users.

+ am i a guy or a girl
* gender=male => You're a guy.
* gender=female => You're a girl.
- I don't think you ever told me what you are.

You can perform the following operations on variable checks:

=  equal to
!= not equal to
<  less than
<= less than or equal to
>  greater than
>= greater than or equal to
?  returns true if the var is even defined

Note: If you want a condition to check the value of a bot variable, you must prepend a # sign on the variable name. For instance:

+ is your name still soandso
* #name = Soandso => That's still my name.
- No, I changed it.

That would check the botvar "name", not the uservar, because of the supplied # sign.

& (Perl)

Sometimes RiveScript isn't powerful enough to do what you want. The & command will execute Perl codes to handle these cases. Be sure to read through this whole manpage before resorting to Perl, though. RiveScript has come a long way since it was known as Alpha.

+ what is 2 plus 2
- 500 Internal Error.
& $reply = '2 + 2 = 4';

// (Comments)

The comment syntax is //, as it is in other programming languages. Also, /* */ comments may be used to span over multiple lines.

// A one-line comment

/*
  this comment spans
  across multiple lines
*/

Comments can be used in-line next to normal RiveScript commands. They are required to have at least one whitespace before or after the comment symbols.

+ what color is my (@colors) * // "what color is my green shoe"
- Your <star2> is <star1>!     // "your shoe is green!"

# (Comments)

An alternative to // comments. These can also be used in-line, provided there are whitespaces before AND after the # symbol.

RIVESCRIPT HOLDS THE KEYS

The RiveScript engine was designed for your RiveScript brain to hold most of the control. As little programming on the Perl side as possible has made it so that your RiveScript can define its own variables and handle what it wants to. See "A GOOD BRAIN" for tips on how to approach this.

COMPLEXITIES OF THE TRIGGER

The + command can be used for more complex things as a simple, 100% dead-on trigger. This part is passed through a regexp. Therefore, any regexp things can be used in the trigger.

Note: an asterisk * is always converted into (.*?) regardless of its context. Keep this in mind.

Alternations: You can use alternations in the triggers like so:

+ what (s|is) your (home|office|cell) phone number

Anything inside of parenthesis, or anything matched by asterisks, can be obtained through the tags <star1> to <star100>. For example (keeping in mind that * equals (.*?):

+ my name is *
- Nice to meet you, <star1>.

Optionals: You can use optional words in a trigger. These words don't have to exist in the user's message but they can. Example:

+ what is your [home] phone number
- You can call me at 555-5555.

So that would match "what is your phone number" as well as "what is your home phone number"

Optionals can have alternations in them too.

+ what (s|is) your [home|office|cell] phone number

Arrays: This is why it's good to define arrays using the !define tag. The best way to explain how this works is by example.

// Make an array of color names
! array colors = red blue green yellow white black orange

// Now the user can tell us their favorite color from the array
+ my favorite color is (@colors)
- Really! Mine is <star1> too!

If you want an array to be matchable, enclose it in parenthesis. This will allow its value to be put into a <star> tag, as in the above example. If you don't include the parenthesis, its value won't be matchable. For an example of the difference:

If the input is "sometimes I am a tool"...

! array be = am are is was were

+ *\bi @be *
    <star1> = ''
    <star2> = 'a tool'

+ *\bi (@be) *
    <star1> = 'sometimes'
    <star2> = 'am'
    <star3> = 'a tool'

It turns your array into regexp form, (?:red|blue|green|yellow|...) before matching so it saves you a lot of work there. Not to mention arrays can be used in any number of triggers! Just imagine how many triggers you can come up with where a color name would be needed...

COMPLEXITIES OF THE RESPONSE

As mentioned above, the - command has many many uses.

One-way question/answer: A single + and a single - will lead to a dead-on question and answer reply.

Random Replies: A single + with multiple -'s will yield random results from among the responses. For example:

+ hello
- Hey.
- Hi.
- Hello.

Would randomly return any of those three responses.

Conditional Fallback: When using conditionals, you should always provide at least one response to fall back on, in case every conditional returns false.

Perl Code Fallback: When executing Perl code, you should always have a response to fall back on [even if the Perl is going to redefine $reply for itself]. This is in case of an eval error and the Perl couldn't do its thing.

Weighted Responses: Yes, with random responses you can weight them! Responses with higher weight will have a better chance of being chosen over ones with a low weight. For example:

+ hello
- Hello, how are you?{weight=49}
- Yo, wazzup dawg?{weight=1}

In this case, "Hello, how are you?" will almost always be sent back. A 1 in 50 chance would return "Yo, wazzup dawg?" instead.

(as a side note: you don't need to set a weight to 1; 1 is implied for any response without weight. Weights of less than 1 aren't acceptable)

BEGIN STATEMENT

The BEGIN file is the first reply file loaded in a loadDirectory call. If a "begin.rs" file exists in the directory being loaded, it is included first.

Note: BEGIN statements are not required. That being said, begin statements are executed before any request.

How to define a BEGIN statement

> begin
  + request
  - {ok}
< begin

Begin statements are sort of like topics, but are always called first. If the response given contains {ok} in it, then the module knows it's allowed to get a reply. Also note that {ok} is replaced with the response. In this way, begin might be useful to format all responses in one way. For a good example:

> begin

  // Don't give a reply if the bot is down for maintenance.
  + request
  * down=yes => The bot is currently deactivated for maintenance.
  - <font color="red"><b>{ok}</b></font>

< begin

That would give the reply about the bot being under maintenance if the variable "down" equals "yes." Else, it would give a response in red bold font.

You can also put tags in to modify the returned responses of the bot. For example, the bot can "type" differently depending on a variable "mood" (see "TAGS")

> begin
  + request
  * mood = happy  => {ok}
  * mood = sad    => {lowercase}{ok}{/lowercase}
  * mood = angry  => {uppercase}{ok}{/uppercase}
  * mood = pissed => {@not talking}
  - {ok}

  + not talking
  - I'm not in a talkative mood.
  - I'm not too happy right now.
  - I don't want to talk right now.
< begin

Note: At the time being, the only trigger that BEGIN ever receives is "request"

The "begin.rs" file is also where you would place your !include statements to make sure that they're included before any other files.

TOPICS

Topics are declared in a way similar to the BEGIN statement. The way to declare and close a topic is generally as follows:

> topic TOPICNAME
  ...
< topic

The topic name should be unique, and only one word.

The Default Topic: The default topic name is "random"

Setting a Topic: To set a topic, use the {topic} tag (see "TAGS" below). Example:

+ i hate you
- You're not very nice. I'm going to make you apologize.{topic=apology}

> topic apology
  + *
  - Not until you admit that you're sorry.

  + sorry
  - Okay, I'll forgive you.{topic=random}
< topic

Always set topic back to "random" to break out of a topic.

OBJECT MACROS

Special macros (Perl routines) can be defined and then utilized in your RiveScript code.

Inline Objects

New with version 0.04 is the ability to define objects directly within the RiveScript code. Keep in mind that the code for your object is evaluated local to RiveScript. That being said, basic tips to follow to make an object work:

1) If it uses any module besides strict and warnings, that module must be explicitely
   declared within your object with a 'use' statement.
2) If your object refers to any variables global to your main program, 'main::' must
   be prepended (i.e. '$main::hashref->{key}')
3) If your object refers to a subroutine of your main program, 'main::' must be prepended
   (i.e. '&main::reload()')

The basic way is to do it like this:

> object fortune
  my ($method,$msg) = @_;

  my @fortunes = (
     'You will be rich and famous',
     'You will meet a celebrity',
     'You will go to the moon',
  );

  return $fortunes [ int(rand(scalar(@fortunes))) ];
< object

Note: the closing tag (last line in the above example) is required for objects. An object isn't included until the closing tag is found.

Define an Object from Perl

This is done like so:

# Define a weather lookup macro.
$rs->setSubroutine (weather => \&weather_lookup);

The code of the subroutine would be basically the same as it would be in the example for Inline Objects. Basically, think of the "> object fortune" as "sub fortune {" and the "< object" as "}" and it's a little easier to visualize. ;)

Call an Object

You can use a macro within a reply such as this example:

+ give me the local weather for *
- Weather for &weather.cityname(<star1>):\n\n
^ Temperature: &weather.temp(<star1>)\n
^ Feels Like: &weather.feelslike(<star1>)

The subroutine "weather_lookup" will receive two variables: the method and the arguments. The method would be the bit following the dot (i.e. "cityname", "temp", or "feelslike" in this example). The arguments would be the value of <star1>.

Whatever weather_lookup would return is inserted into the reply in place of the macro call.

Note: If a macro does not exist, has faulty code, or does not return a reply, the contents of global "macro_failure" will be inserted instead. At this time the module is unable to tell you which of the three errors is the cause.

ENVIRONMENTAL VARIABLES

Environmental variables are kept as "botvariables" (i.e. they can be retrieved with the <bot> tag). The variable names all begin with "ENV_" and are in uppercase.

RiveScript Environment Variables

ENV_OS         = The operating system RiveScript is running on.
ENV_APPVERSION = The version of RiveScript used.
ENV_APPNAME    = A user-agent style string that looks like "RiveScript/0.08"

Perl Environment Variables

All the environment variables available to your Perl script are kept under ENV_SYS_ with their original names following. For example, ENV_SYS_PATH would be the %PATH% variable on Windows.

Set Environment Variables

Currently, RiveScript's syntax does not allow the modification of any variable beginning with "env_". If you absolutely must override one of these variables for any reason at all, you can call the setVariable() method to do so.

PERSON SUBSTITUTION

The {person} tag can be used to perform substitutions between 1st- and 2nd-person adjectives (see "TAGS").

You define these with the !define tag in a similar fashion as how you define substitution data. For example:

! person i     = you
! person my    = your
! person mine  = yours
! person me    = you
! person am    = are
! person you   = I
! person your  = my
! person yours = mine
! person are   = am

Then use the {person} tag in a response. The enclosed text will swap the words listed with the !person tags. For instance:

+ do you think *
- What if I do think {person}<star>{/person}?

"Do you think I am a bad person?"
"What if I do think you are a bad person?"

See, that's the use of this tag. Otherwise the bot would have replied "What if I do think I am a bad person?" and not make very much sense.

Note: RiveScript does NOT assume any person substitutions. Your RiveScript code must define them as exampled above.

DYNAMIC REPLIES

A function added in version 0.07 is to write() the loaded replies into a single RS file. This is useful for if your program dynamically learns new replies.

This section of the POD is devoted to explaining the setup of the internal hashrefs of the RiveScript instance.

$rs->{replies}

This hashref contains the meat of the loaded replies. The first keys here are the topics (keep in mind that 'random' is the default topic). For replies that had %PREVIOUS in them, their topics are '__that__(bots last message, lowercase and without punctuation)' and that the data from BEGIN is in '__begin__'

So for example, $rs->{replies}->{random} is where replies under the default topic are, while $rs->{replies}->{apology} is where replies under the 'apology' topic are, et cetera.

The sub-keys under a topic are the triggers. These are literally the strings you'd find in the file at the + command.

For example, $rs->{replies}->{random}->{'my favorite color is (@colors)'}

Trigger Keys

The following keys are used under trigger hashrefs ($rs->{replies}->{$topic}->{$trigger})

1..n - The -REPLIES under the trigger. The first - is position 1, and they increment from there.

redirect - The data from the @redirect command. Since RiveScript only supports a single @redirect in a message, this always has a single value.

conditions->{1..n} - The data from the *condition commands. This is in similar format to the -replies, where 1 is the first condition.

system->{codes} - The contents of any system codes provided by &perl commands.

Sorted Arrays

The first keys under $rs->{array} are the topic names, as they are in $rs->{replies}. But the contents of each topic key is an array ref of the sorted triggers.

Generally, you shouldn't have to worry about modifying this variable directly--just call sortReplies() and it will manage it automatically.

Examples

// RiveScript Code
+ my name is *
- <star>, nice to meet you!
- Nice to meet you, <star>.

# Perl code. Get the value of the second reply.
$rs->{replies}->{random}->{'my name is *'}->{2}

// RiveScript Code
> topic favorites
  + *(@colors)*
  - I like <star2> too. :-)
  & &main::log('<id> likes <star2>')
< topic

# Perl code. Get the perl data from that trigger.
$rs->{replies}->{favorites}->{'*(@colors)*'}->{system}->{codes}

// RiveScript Code
+ *
% whos there
- <star> who?

# Perl code. Access this one's reply.
$rs->{replies}->{'__that__whos there'}->{1}

INCLUDED FILES

Recommended Practice is to put all your !include statements inside your "begin.rs" file, as this file is loaded in first. The "include" statement is for including common libraries or packages.

RiveScript Libraries

RiveScript Libraries (.rsl extention) are special RiveScript documents which contain nothing but !arrays and !substitutions and the like. For instance, you could make a language library which could contain arrays of verbs and their conjugations.

RiveScript Packages

RiveScript Packages (.rsp extension) are special RiveScript documents which contain one (or more) objects. For example, you might create a RiveScript package full of objects for returning the date and time in different formats.

RiveScript Include Search Path

The current RiveScript Includes search path is an array of Perl's @INC, with "/RiveScript" tacked on the end of it. Also "." is an include path (the working directory of the script running RiveScript).

You can use the !addpath directive to add new search paths.

RESERVED VARIABLES

The following are all the reserved variables and values within RiveScript's processor.

Reserved Global Variables

These variables cannot be overwritten with the ! global command:

reserved replies array syntax streamcache botvars uservars
botarrays sort users substitutions

Reserved Topic Names

The following topic names are reserved and should never be (re)created in your RiveScript files:

__begin__   (used for the BEGIN method)
__that__*   (used for the %PREVIOUS command)

A GOOD BRAIN

Since RiveScript leaves a lot of control up to the brain and not the Perl code, here are some general tips to follow when writing your own brain:

Make a config file. This would probably be named "config.rs" and it would handle all your definitions. For example it might look like this:

// Set up globals
! global debug = 0
! global split_sentences = 1
! global sentence_splitters = . ! ; ?

// Set a variable to say that we're active.
! var active = yes

// Set up botvariables
! var botname = Rive
! var botage = 5
! var company = AiChaos Inc.
// note that "bot" isn't required in these variables,
// it's only there for readibility

// Set up substitutions
! sub won't = will not
! sub i'm = i am
// etc

// Set up arrays
! array colors = red green blue yellow cyan fuchsia ...

Here are a list of all the globals you might want to configure.

split_sentences    - Whether to do sentence-splitting (1 or 0, default 1)
sentence_splitters - Where to split sentences at. Separate items with a single
                     space. The defaults are:   ! . ? ;
macro_failure      - Text to be inserted into a bot's reply when a macro fails
                     to run (or return a reply).
debug              - Debug mode (1 or 0, default 0)

Make a begin file. Create a file called "begin.rs" -- there are several reasons for doing so.

For one, you should use this file for !include statements if you want your brain to use some common libraries or packages. Secondly, you can use the >BEGIN statement to setup a handler for incoming messages.

Your begin file could check the "active" variable we set in the config file to decide if it should give a reply.

> begin
  + request
  * active=no => Sorry but I'm deactivated right now!
  - {ok}
< begin

These are the basic tips, just for organizational purposes.

SEE OTHER

RiveScript::Parser - Reading and Writing of RiveScript Documents

RiveScript::Brain - The reply and search methods of RiveScript.

RiveScript::Util - String utilities for RiveScript.

KNOWN BUGS

None yet known.

CHANGES

Version 0.19
- Added methods for allowing or denying certain commands to be used when RiveScript
  documents are loaded in.
- Bugfix: the sortThats() method of RiveScript::Parser was blanking out the current
  value of $self->{thatarray} -- meaning, the last file to have %Previous commands used
  would be kept in memory, previous ones would be lost. This has been fixed now.

Version 0.18
- Minor bugfix with the "%PREVIOUS" internal array.

Version 0.17
- All the "%PREVIOUS" commands found at loading time are now sorted in an internal
  arrayref, in the same manner that "+TRIGGERS" are. This solves the bug with
  matchability when using several %PREVIOUS commands in your replies.
- Added the # command as a "Perly" alternative to // comments.
- Comments can be used in-line next to normal RiveScript code, requiring that at
  least one space exist before and after the comment symbols. You can escape the
  symbols too if you need them in the reply.
- Created a new package DateTime.rsp for your timestamp-formatting needs.

Version 0.16
- Added "! syslib" directive for including Perl modules at the RiveScript:: level,
  to save on memory usage when more than one object might want the same module.
- The "%PREVIOUS" directive now takes a regexp. The bot's last reply is saved as-is,
  not formatted to lowercase. The % command now works like a +Trigger for the bot's
  last reply.
- The "%PREVIOUS" directive check has been moved to another subroutine. In this way,
  its priority is much higher. A trigger of * (catch-all) with a %PREVIOUS will always
  match, for example.
- Fixed a bug with the BEGIN method. The bot's reply is no longer saved while the
  topic is __begin__ - this messed up the %THAT directive.

Version 0.15
- Broke RiveScript into multiple sub-modules.

Version 0.14
- {formal} and {sentence} tags fixed. They both use regexp's now. {sentence} can
  take multiple sentences with no problem.
- In a BEGIN statement, {topic} tags are handled first. In this way, the BEGIN
  statement can force a topic before getting a reply under the user's current topic.
- Fixed a bug with "blank" commands while reading in a file.
- Fixed a bug with the RiveScriptLib Search Paths.

Version 0.13
- The BEGIN/request statement has been changed. The user that makes the "request"
  is the actual user--no longer "__rivescript__", so user-based conditionals can
  work too. Also, request tags are not processed until the reply-getting process
  is completed. So tags like {uppercase} can modify the final returned reply.

Version 0.12
- Migrated to RiveScript:: namespace.

Version 0.11
- When calling loadDirectory, a "begin.rs" file is always loaded first
  (provided the file exists, of course!)
- Added support for "include"ing libraries and packages (see "INCLUDED FILES")

Version 0.10
- The getUservars() method now returns a hashref of hashrefs if you want the
  vars of all users. Makes it a little easier to label each set of variables
  with the particular user involved. ;)
- Cleaned up some leftover print statements from my debugging in version 0.09
  (sorry about that--again!)
- Made some revisions to the POD, fixed some typo's, added {weight} and {ok}
  to the TAGS section.

Version 0.09
- $1 to $100+ are now done using an array rather than a hash. Theoretically
  this allows any number of stars, even greater than 100.
- Arrays in triggers have been modified. An array in parenthesis (the former
  requirement) will make the array matchable in <star#> tags. An array outside
  of parenthesis makes it NOT matchable.
- Minor code improvements for readibility purposes.

Version 0.08
- Added <add>, <sub>, <mult>, and <div> tags.
- Added environmental variable support.
- Extended *CONDITION to support inequalities
- Botvars in conditions must be explicitely specified with # before the varname.
- Added "! person" substitutions
- Added {person} tag

Version 0.07
- Added write() method
- reply() method now can take tags to force scalar return or to ignore
  sentence-splitting.
- loadDirectory() method can now take a list of specific file extensions
  to look for.
- Cleaned up some leftover debug prints from last release (sorry about that!)

Version 0.06
- Extended ^CONTINUE to cover more commands
- Added \s and \n tags
- Revised POD

Version 0.05
- Fixed a bug with optionals. If they were used at the start or end
  of a trigger, the trigger became unmatchable. This has been fixed
  by changing ' ' into '\s*'

Version 0.04
- Added support for optional parts of the trigger.
- Begun support for inline objects to be created.

Version 0.03
- Added search() method.
- <bot> variables can be inserted into triggers now (for example having
  the bot reply to its name no matter what its name is)

Version 0.02
- Fixed a regexp bug; now it stops searching when it finds a match
  (it would cause errors with $1 to $100)
- Fixed an inconsistency that didn't allow uservars to work in
  conditionals.
- Added <id> tag, useful for objects that need a unique user to work
  with.
- Fixed bug that lets comments begin with more than one set of //

Version 0.01
- Initial Release

TO-DO LIST

Feel free to offer any ideas. ;)

SPECIAL THANKS

Special thanks goes out to jeffohrt and harleypig of the AiChaos Forum for helping so much with the development of RiveScript.

KEYWORDS

bot, chatbot, chatterbot, chatter bot, reply, replies, script, aiml, alpha

AUTHOR

Cerone Kirsle, kirsle --at-- rainbowboi.com

COPYRIGHT AND LICENSE

RiveScript - Rendering Intelligence Very Easily
Copyright (C) 2006  Cerone J. Kirsle

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

1 POD Error

The following errors were encountered while parsing the POD:

Around line 1146:: Unknown E content in E<LT>

To install RiveScript, copy and paste the appropriate command in to your terminal.

cpanm

cpanm RiveScript

CPAN shell

perl -MCPAN -e shell
install RiveScript

For more information on module installation, please visit the detailed CPAN module installation guide.

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	go to github issues (only if github is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

	Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)