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Hi. This is an introduction to [br]the language tool rule editor.

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LanguageTool is an open source [br]style and grammar checker.

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It finds errors by searching a text [br]for error patterns.

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This rule editor lets you [br]write those error patterns.

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In other words, if you know [br]how to use this rule editor,

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you can help make the LanguageTool [br]more powerful.

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I'll now show you how to use it.

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First, make sure the correct language is set.

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Now, you need to think of a specific error[br]that you want LanguageTool to detect

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Think of a sentence with this error[br]and enter it to the wrong sentence field.

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For this example, I'll use the error:

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"Sorry for my bed [sic] English"

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where "bad" is misspelt (as "bed")

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I will also enter the correct version[br]of this sentence

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into the corrected sentence field

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Click on the button.

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A new section opens where we can[br]specify the error pattern.

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But first, the rule editor lets you know[br]

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that LanguageTool already finds[br]the error in our example sentence.

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As this is just an example,[br]I will ignore this message.

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Now comes the main part – the error pattern.

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You can see in initial error patterns[br]just one word: "bed".

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But "bed" itself is a correct word.

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If our pattern only contained this word,

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LanguageTool would complain about[br]any sentence with the word "bed".

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That's obviously not useful at all.

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What I want is to say that "bed" is only[br]wrong in specific contexts.

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In this case, it is only wrong[br]followed by the word "English",

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so i click the "add token to pattern" link

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and here I add the word "English".

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This pattern will now match all sentences

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where the word "bed" with an "e"[br]is directly followed by the word "English".

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I will try out the rule now.

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For that, I give the rule a name.

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This name is what a user of LanguageTool[br]will see in the configuration dialogue,

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and I'll add a message.

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This is what the LanguageTool user will see[br]if the rule matches a sentence.

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So it should be a short helpful text.

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I'll put single quotes ('') around the[br]correct word to mark it as a suggestion.

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The other fields are optional and we'll[br]leave them just blank for now.

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Now when clicking the [br]"evaluate error pattern button"

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both my example sentences get checked

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plus a few thousand other test sentences,[br]for example from Wikipedia.

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Everything is ok so far

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and the rule editor displays the snippet[br]of XML code.

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This is the code that LanguageTool needs[br]to use your rule.

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If you think your rule is useful for[br]future versions of LanguageTool,

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please send it to the developers.

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There's a link here with contact information.

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Now let's have a look at what happens[br]if your rule doesn't quite work.

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Assume for example your rule[br]was only one word:

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"Bed" with an "e".

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If I evaluate this rule, I get[br]a lot of matches,

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and these matches don't seem to have errors.

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This is a clear sign that the pattern[br]is not strict enough

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so one might want to add another word.

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So for now, we've only looked at[br]matching simple words.

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But you can also match regular expressions[br]by clicking the "Regex" check box.

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For example, match English or French[br]by using a pipe [ | ] symbol.

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You can also match words by[br]their part of speech.

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Click the "part of speech" radio button[br]and enter the text field.

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For some languages, a help will show up about [br]the parts of speech that can be addressed.

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This help will tell you for example that[br]

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"NNP" is the code for singular proper[br]nouns in English.

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If you evaluate the rule with this,

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it will also work as the word "English"[br]is detected as a singular proper noun.

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If you use a part of speech that doesn't[br]match, the rule editor will let you know.

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Like this, you can see the part of speech[br]of the example sentence here.

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So this was our short introduction[br]to the rule editor.

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We hope you use it to create new error[br]patterns to make LanguageTool more powerful.

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If you have questions, feel free[br]to contact us on the forum.

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You can find the link on LanguageTool.org[br](https://languagetool.org/)

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This video was subtitled by safetex@ymail.com