Markup Language Stylization

One or more computer-readable storage media encoded with computer-executable instructions that, when executed, direct a computing system to perform acts comprising:

• receiving a request for a source document having a markup language;
• identifying a manifest document associated with the requested source document;
• determining an overlay document to be applied to the source document as specified by the manifest document, the markup language including:
• a source lock attribute to prevent an attribute of an element of a section of the source document from modification by the overlay document;
• a source lock attribute to prevent content of an element of a section of the source document from modification by the overlay document;
• and
• a source lock attribute to prevent a specified structure of an element of a section of the source document from modification by the overlay document;
• and
• generating a modified source document by applying the overlay document to the source document.

A system comprising:

• memory;
• one or more processors communicatively coupled to the memory to execute a website rendering engine stored in the memory, the website rendering engine to:
• identify an overlay document to be applied to a source document;
• generate a landmark hierarchy based, at least in part, on the overlay document, wherein each landmark represents a corresponding element that may be present in the source document;
• search through elements in the source document to identify an element that corresponds to a first landmark in the landmark hierarchy;
• identify an overlay directive associated with the first landmark;
• determine that the element that corresponds to a first landmark is absent a source lock attribute;
• and
• generate a modified element by applying the overlay directive to the element that corresponds to the first landmark in the landmark hierarchy.