The normal QRS axis, like the P wave axis, points downward and to the left within a coordinate between -30 o and +90 o. This axis is said to be deviated to the left (left axis deviation or LAD) if it lies between -30 o and -90 o; and deviated to the right (right axis deviation or RAD) if it lies between +90 o and 180 o.
Schema.org Structured Data. Schema.org (often called Schema) is a specific vocabulary of tags (or microdata) that you can add to your HTML to improve the way your page is represented in SERPs.chema.org (often called Schema) is a specific vocabulary of tags (or microdata) that you can add to your HTML to improve the way your page is represented in SERPs.
A schema is a mental concept that informs a person about what to expect from a variety of experiences and situations. Schemas are developed based on information provided by life experiences and are then stored in memory. Our brains create and use schemas as a short cut to make future encounters with similar situations easier to navigate. We will look at a couple of examples that will help illustrate the definition.