This procedure returns a specifier for the environment that results by starting with an empty environment and then importing each list, considered as an import-set, into it. The bindings of the environment represented by the specifier are immutable, as is the environment itself. See the eval function for examples.

This procedure returns an environment that contains no variable bindings, but contains (syntactic) bindings for all the syntactic keywords.

The effect of assigning to a variable in this environment (such as let) is undefined.

The version must be an exact non-negative inetger corresponding to a version of one of the Revisedversion Reports on Scheme. The procedure returns an environment that contains exactly the set of bindings specified in the corresponding report.

This implementation supports version that is 4 or 5.

The effect of assigning to a variable in this environment (such as car) is undefined.

This procedure return an environment that contains implementation-defined bindings, as well as top-level user bindings.

Return true #t if there is a binding for symbol in environment; otherwise returns #f.

Call proc for each key in the environment, which may be any argument to eval, such as (interaction-environment) or a call to the environment procedure. The proc is called with two arguments: The binding’s key, and an accumulator value. The init is the initial accumulator value; the result returned by proc is used for subsequent accumulator values. The value returned by environment-fold is the final acumulator value.

A key is normally a symbol, but can also be a KeyPair object (a pair of a symbol and a property symbol used to implement Common Lisp-style property lists).

(environment-fold (environment '(scheme write)) cons '())
  ⇒ (display write-shared write write-simple)

To get all the predefined bindings use (environment '(kawa base)).

Evaluate the init expressions. Then modify the dynamic bindings for the variables to the values of the init expressions, and evaluate the body expressions. Return the result of the last expression in body. Before returning, restore the original bindings. The temporary bindings are only visible in the current thread, and its descendent threads.

If node is specified, returns the base-URI property of the node. If the node does not have the base-URI property, returns #f. (The XQuery version returns the empty sequence in that case.)

In the zero-argument case, returns the "base URI" of the current context. By default the base URI is the current working directory (as a URL). While a source file is loaded, the base URI is temporarily set to the URL of the document.

This procedure evaluates expression in the environment indicated by environment. The default for environment is the result of (interaction-environment).

(eval ’(* 7 3) (environment '(scheme base)))
            ⇒ 21

(let ((f (eval '(lambda (f x) (f x x))
               (null-environment 5))))
  (f + 10))
            ⇒ 20

(eval '(define foo 32) (environment '(scheme base)))
            ⇒ error is signaled

The path can be an (absolute) URL or a filename of a source file, which is read and evaluated line-by-line. The path can also be a fully-qualified class name. (Mostly acts like the -f command-line option, but with different error handling.) Since load is a run-time function it doesn’t know about the enclosing lexical environment, and the latter can’t know about definitions introduced by load. For those reasons it is highly recommended that you use instead use require or include.

Evaluation is done in the specified environment, which defauls to result of (interaction-environment).

The load-relative procedure is like load, except that path is a URI that is relative to the context’s current base URI.