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 database schema is a collection of metadata that describes the relations in a database. A schema is also described as the layout or blueprint of a database that outlines the way data is organized into tables. A schema is normally described using Structured Query Language (SQL) as a series of CREATE statements that may be used to replicate the schema in a new database. An easy way to envision a schema is to think of it as a box that holds tables, stored procedures, views and the rest of the database in its entirety.