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# Breaking out of the Box Up until now, we've highlighted cool features of Hobo, and made everything look easy. You can't blame us, can you? Hobo makes the first 90% of your application really easy, but we cannot anticipate everything. That last 10% is what makes your application special, and cannot be included in any toolkit. Most rapid application generators put you inside a box -- if you stay inside the box, everything is easy. Some won't let you break out of the box, and others make it very difficult. With Hobo there is no box. More and more customization is required the further you stray away from what has been anticipated, but the border is not sharp. In essence, Hobo and DRYML support five different ways of customizing a widget, page or action. ## Parametrization Most of what you have seen so far in this tutorial has been parametrization. In DRYML you can set the attributes or parameters of a tag you invoke, in Ruby you can change the parameters to functions you invoke. ## Extension In DRYML, there is a tag called [extend](/manual/dryml-guide#customising_and_extending_tags). Extend allows you to redefine an existing tag while reusing the existing definition. This allows you to add to the tag or change its default parametrization. You saw an example of extension in DRYML in [Customizing Views](#customising_views). ## Redefinition The next level of customization is to redefine a tag or function. `app/views/taglibs/application.dryml` gets loaded after the RAPID library and the auto-generated DRYML, so if you redefine a tag, your definition will be used instead of the library definition. Perhaps the first thing that many developers customize is the navigation bar. In our little tutorial, we want to remove the "Story Status" tab. The nice thing about redefining a tag is that you can use the existing definition for a little bit of cut and paste. Cutting and pasting is generally frowned upon -- DRYML includes "don't repeat yourself", after all, but sometimes we do it anyways. In our case, we'll be cutting and pasting from the top of `view/taglibs/auto/rapid/pages.dryml`. SHOW_PATCH You will notice that we've removed the StoryStatus line. We've also removed the "param" attributes. Nobody is going to be parameterzing our redefinition, so let us make it a little simpler. ## Defining new tags Creating new tags is outside of the scope of this tutorial. Creating new tags lets you avoid cutting and pasting, and lets you reuse your code throughout your project and into other projects. For more information on DRYML, see the [manual](/manual). ## Replacement When you want to do something completely different, you can completely bypass the existing tags. `app/views/projects/show.dryml` can contain raw HTML with little or no DRYML. You can also bypass DRYML and create `app/views/projects/show.html.erb` and use standard Ruby on Rails techniques. Hobo models and controllers follow standard Rails conventions, so completely custom views can be used without defining custom controllers and models or vice versa.
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