How to create and configure Slots

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Intent Recognition | NLU slot + Intent and Fallback subslots

Purpose and general information

⁠
@NLU
⁠
is a
@Slot
⁠
designed to implement speech recognition by the
@Agent
⁠
— processing messages in natural language in order to determine the expressed intention (
@Intent
⁠
) of the
@Bot User
⁠
and, depending on it, move to the appropriate
@Script Branch
⁠
.
⁠
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⁠
⁠
An
@NLU
⁠
@Slot
⁠
is a
@Complex Slot
⁠
and cannot exist without its
@Child Slot
⁠
s:
@intent
⁠
and
@fallback
⁠
@Subslot
⁠
s, which begin their own
@Script Branch
⁠
es to which the transition will be made once the corresponding
@Intent
⁠
is recognized.
The
@NLU
⁠
@Slot
⁠
processes the incoming
@Bot User
⁠
‘s
@Request
⁠
previously recorded in the
@client_message
⁠
@Context Variable
⁠
.
An
@NLU
⁠
@Slot
⁠
recognizes only those
@Intent
⁠
s that are enclosed in its
@intent
⁠
@Subslot
⁠
s; the remaining
@Intent
⁠
s existing in the
@Company
⁠
do not participate in recognition in this
@NLU
⁠
@Slot
⁠
. For example, in the image above, the
@NLU
⁠
@Slot
⁠
will be trained to recognize only the two
@Intent
⁠
s that are selected in its
@intent
⁠
@Subslot
⁠
s. If none of these
@Intent
⁠
s are recognized, the
@Conversation
⁠
will move to the
@fallback
⁠
@Subslot
⁠
.

Slot creation and settings

Slot attributes

⁠
image.png
⁠
⁠
Name — the name of the
@Slot
⁠
, which will be displayed in the
@Script Tree
⁠
. The maximum length of a field value is 40 characters.
Confidence Threshold — the minimum value of confidence in a recognized
@Intent
⁠
, expressed as a percentage, at which the
@Intent
⁠
is considered recognized and the
@Conversation
⁠
can go to its
@Script Branch
⁠
(the
@fallback
⁠
@Subslot
⁠
@Script Branch
⁠
). The value can be an integer from 0 to 100.
It is recommended to set the
@Confidence Threshold
⁠
value based on the statement that this value should be inversely proportional to the number of
@Intent
⁠
s in the
@Slot
⁠
: the more
@Intent
⁠
s, the lower the
@Confidence Threshold
⁠
should be. To begin with, it is recommended to set the value to 15 and change this value depending on the results of testing the
@Agent
⁠
. Read more:

Subslot intent attributes

⁠
image.png
⁠
⁠
Name — the name of the
@Slot
⁠
, which will be displayed in the
@Script Tree
⁠
. The maximum length of a field value is 40 characters. If a name is not entered, the
@Platform
⁠
automatically copies the
@Intent
⁠
name from the Intent field to the Name field.
Intent —
@Intent
⁠
, upon recognition of which
@Conversation
⁠
will go along the
@Script Branch
⁠
following this
@Subslot
⁠
.
SHOW INTENT IN A NEW TAB button — by clicking the button, the
@Intent
⁠
selected in the field opens in the next browser tab.

Subslot fallback attributes

⁠
image.png
⁠
⁠
Name — the name of the
@Slot
⁠
, which will be displayed in the
@Script Tree
⁠
. The maximum length of a field value is 40 characters. When creating an
@NLU
⁠
@Slot
⁠
, the Name field of the
@fallback
⁠
@Subslot
⁠
is automatically filled with the contents of the Name field of the
@NLU
⁠
@Slot
⁠
. If the contents of the Name field are removed, the
@Subslot
⁠
in the
@Script Tree
⁠
will appear without a name.

Subslots intent and fallback

Automatic generation of subslots when creating an NLU slot

When creating an
@NLU
⁠
@Slot
⁠
, two
@intent
⁠
@Subslot
⁠
s and a
@fallback
⁠
@Subslot
⁠
are automatically generated. If there are no
@Intent
⁠
s in the
@Company
⁠
, then
@Subslot
⁠
s with automatically generated
@Intent
⁠
s will be created behind the
@NLU
⁠
@Slot
⁠
:
⁠
image.png
⁠
⁠
These
@Intent
⁠
s will appear in
@Company Resources
⁠
. About creating
@Intent
⁠
s: .
You can replace
@Intent
⁠
s in generated
@Subslot
⁠
s by expanding the
@Subslot
⁠
by double-clicking the mouse, clicking on the name of the
@Intent
⁠
and selecting the desired one from the drop-down list and clicking the Save button.
⁠
image.png
⁠
⁠

Adding Intent Subslots

To add a new
@Subslot
⁠
, you need to click on the + button. The new
@Subslot
⁠
will appear in the
@Script Tree
⁠
above the
@Subslot
⁠
, which is always located at the bottom.
⁠
image.png
⁠
⁠

Removing Intent and Fallback subslots

To remove an
@intent
⁠
@Subslot
⁠
, you need to right-click on it and click the Remove Branch button, then click OK in the pop-up dialog box.
⁠
image.png
⁠
⁠
⁠
image.png
⁠
⁠
It is possible to delete any
@intent
⁠
@Subslot
⁠
if, after deletion, the
@NLU
⁠
@Slot
⁠
remains at least two
@intent
⁠
@Subslot
⁠
s.
Removing one of the last two
@intent
⁠
@Subslot
⁠
s is not possible. When you try to do this, the following error will appear at the bottom center:
⁠
image.png
⁠
⁠
Removing the
@fallback
⁠
@Subslot
⁠
is not possible. When you try to do this, the following error will appear at the bottom center:
⁠
image.png
⁠
⁠

Slot operation

The
@NLU
⁠
@Slot
⁠
is trained on
@Training Dataset
⁠
of
@Intent
⁠
s added as its
@Subslot
⁠
@intent
⁠
. About filling
@Training Dataset
⁠
: .
The
@NLU
⁠
@Slot
⁠
receives the
@client_message
⁠
@Context Variable
⁠
as input, processes it, recognizes the
@Intent
⁠
, and transfers the
@Conversation
⁠
to the recognized
@Intent
⁠
@Script Branch
⁠
. If no
@Intent
⁠
is recognized with the proper level of confidence, the
@Conversation
⁠
goes to the
@fallback
⁠
@Subslot
⁠
.

Intent recognition process

Training: The
@NLU
⁠
@Slot
⁠
is trained on samples of
@Intent
⁠
s added as its
@intent
⁠
@Subslot
⁠
s.
Important: if the
@Agent
⁠
was edited, but the changes affected only the contents of other
@Slot
⁠
s, in addition to
@NLU
⁠
@Slot
⁠
, then when the
@Agent
⁠
is retrained, the
@NLU
⁠
@Slot
⁠
will not be retrained.
Receiving a
@Request
⁠
: the
@NLU
⁠
@Slot
⁠
receives the
@Bot user’s Message
⁠
— the text in the
@client_message
⁠
@Context Variable
⁠
.
Classification of the
@Request
⁠
: the message is classified from the
@client_message
⁠
@Context Variable
⁠
and arranges all
@Intent
⁠
s of this
@NLU
⁠
@Slot
⁠
according to the level of confidence in them — confidence (expressed as a percentage, the same as CONFIDENCE THRESHOLD).
Creation of the
@nlu_result
⁠
@Context Variable
⁠
in the
@Chat Context
⁠
: the
@nlu_result
⁠
@Context Variable
⁠
is created, the value of which becomes a json object containing information about the top 5 recognized
@Intent
⁠
s in descending order of their confidence.
Example: [{'intent_name': 'size', 'confidence': 0.9993743300437927}, {'intent_name': 'product_in_stock', 'confidence': 0.00019508253899402916}, {'intent_name': 'model_price', 'confidence': 0.00012844 608863815665} , {'intent_name': 'address', 'confidence': 0.00010525238758418709}]
Transition to
@intent
⁠
:
@Intent
⁠
with maximum confidence, provided that this confidence >= CONFIDENCE THRESHOLD from the settings of this
@NLU
⁠
@Slot
⁠
, is the
@Intent
⁠
by which the
@Request
⁠
is recognized. Consequently:
The
@Conversation
⁠
will go to the
@Script Branch
⁠
of this
@intent
⁠
@Subslot
⁠
;
the
@intent_name
⁠
@Context Variable
⁠
appears in the
@Chat Context
⁠
ー the name of the recognized
@Intent
⁠
;
the
@intent
⁠
@Context Variable
⁠
appears in the
@Chat Context
⁠
— the identifier of the recognized
@Intent
⁠
;
the
@confidence
⁠
@Context Variable
⁠
appears in the
@Chat Context
⁠
— the level of confidence that the
@Request
⁠
belongs to a specific
@Intent
⁠
, expressed as a percentage.
The
@intent
⁠
and
@confidence
⁠
@Context Variable
⁠
s exist in the
@Chat Context
⁠
until the next execution of the same or another
@NLU
⁠
@Slot
⁠
in this
@Agent
⁠
.
Transition to
@fallback
⁠
: If the confidence of all
@Intent
⁠
s is below CONFIDENCE THRESHOLD from the settings of this
@NLU
⁠
@Slot
⁠
, then it is considered that not a single
@Intent
⁠
was recognized, as a consequence:
The
@Conversation
⁠
will go to the
@fallback
⁠
@Subslot
⁠
@Script Branch
⁠
;
the
@error
⁠
@Context Variable
⁠
appears in the
@Chat Context
⁠
— the error text. This
@Context Variable
⁠
exists in the
@Chat Context
⁠
until:
next execution of the same or another
@NLU
⁠
@Slot
⁠
;
⁠
@Regular Expression Slot
⁠
execution;
⁠
@External Request
⁠
@Slot
⁠
execution.
Available languages to recognize by NLU Slot
4
Language
Abbreviation in the dropdown list
1
Russian
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2
English
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3
Portuguese
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4
Ukrainian
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5
Spanish
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6
Vietnamese
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7
Thai
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8
Indonesian
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9
Malay
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10
Filipino
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11
Serbian
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12
German
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13
Polish
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14
French
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15
Pakistani (urdu)
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16
Kyrgyz
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17
Arabian
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