The error simply means that your syntax is incorrect and the parser could not understand the character at line 16, character 46. In this case, you are using "=" instead of the correct "==":

           pointId: Point(page == "home", region == "center-content")

    Also, remember that constraints can only exist inside a pattern, so your "properties" constraint must go inside the proper pattern that I guess is "Content"

           content: Content(id=="adslot", properties["type"]=="ad" )

   []s
   Edson


2010/1/13 Pritam <infinity2heaven@gmail.com>

While executing the following rule,

rule "home dummy"
       when
           pointId: Point(page == "home", region ="center-content")
           content: Content(id=="adslot")
           properties["type"]=="ad" from content
       then
           filter.put(content.id, true);
end

I get the following error:
[ERR 101] Line 16:46 no viable alternative at input 'EQUALS' in rule "home
dummy" in pattern PointId[18,16]: [ERR 102] Line 18:16 mismatched input
'"type"' expecting ']' in rule "home dummy" in pattern properties

The documentation explains that this is the most common error but I still
struggle to understand the correct grammar for writing rules. Can anyone
point me to a good resource (I even read the book "drools 5) for writing the
following rule in a drl format?

" If a Point has a page, "home" and region, "center-content" and the Content
id is "adslot" with a property, type as "ad" then filter the Content (using
a global map and passing a boolean flag)

Thanks
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 Edson Tirelli
 JBoss Drools Core Development
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