Learn what makes industry-standard XML formats different and discover the best open-source Linux and enterprise tools used to process them.

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Accepts zero or more strings as arguments and returns a string created by concatenating the values of each of these arguments. The function requires at least two arguments. If an argument is an empty ...

Returns TRUE if the effective Boolean value of $arg is false, and returns FALSE if the effective Boolean value of $arg is true. The following query constructs XML ...

Classical conditioning is a way to learn using unconscious associations. Pavlov discovered classical conditioning when dogs started to salivate at the sound of a bell before they got food. The ...

Maladaptive behaviors are actions that don’t help solve problems and can harm emotional health. Examples of maladaptive behaviors include avoidance, procrastination, and aggression. These behaviors ...