<commit_before>GSS engine [![Build Status](https://travis-ci.org/the-gss/engine.png?branch=master)](https://travis-ci.org/the-gss/engine)
==========

[![Cross-browser testing status](https://saucelabs.com/browser-matrix/gss-engine.svg)](https://saucelabs.com/u/gss-engine)

Compiles and runs Grid Style Sheet (GSS) rules. GSS is an implementation of Badros & Borning's [Constraint Cascading Style Sheets](http://www.cs.washington.edu/research/constraints/web/ccss-uwtr.pdf), enabling far better layout control through building relational rules between different elements.

GSS supports the following syntaxes for defining layout rules:

* [CCSS](https://github.com/the-gss/ccss-compiler#readme) - direct constraints related to position and size of DOM elements
* [VFL](https://github.com/the-gss/vfl-compiler#readme) - horizontal and vertical spacing constraints based on [Apple's Visual Format Language](http://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/AutolayoutPG/Articles/formatLanguage.html)<commit_msg>VFL link was broken<commit_after>GSS engine [![Build Status](https://travis-ci.org/the-gss/engine.png?branch=master)](https://travis-ci.org/the-gss/engine)
==========

[![Cross-browser testing status](https://saucelabs.com/browser-matrix/gss-engine.svg)](https://saucelabs.com/u/gss-engine)

Compiles and runs Grid Style Sheet (GSS) rules. GSS is an implementation of Badros & Borning's [Constraint Cascading Style Sheets](http://www.cs.washington.edu/research/constraints/web/ccss-uwtr.pdf), enabling far better layout control through building relational rules between different elements.

GSS supports the following syntaxes for defining layout rules:

* [CCSS](https://github.com/the-gss/ccss-compiler#readme) - direct constraints related to position and size of DOM elements
* [VFL](https://github.com/the-gss/vfl-compiler#readme) - horizontal and vertical spacing constraints based on [Apple's Visual Format Language](https://developer.apple.com/library/ios/documentation/userexperience/conceptual/AutolayoutPG/VisualFormatLanguage/VisualFormatLanguage.html)
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