CODEWITHSUNDEEP
xquerymarklogic
user5474448
user5474448

Reputation:

How to import common module namespaces in xquery

I have few module namespace xquery files which were used in multiple files. I want to have the namespaces in one common xquery file and import that file whereever I want to use.

Say for example,

I have process-lib.xqy, util-lib.xqy and query-lib.xqy. I used to import these in multiple files like following,

import module namespace util = "util" at "util-lib.xqy";
import module namespace process = "process" at "process-lib.xqy";
import module namespace query = "query" at "query-lib.xqy";

Now I tried to use them in one common file named as common-import.xqy and import this file in multiple files.

when I tried this approach,

import module namespace common-import= "common-import" at "common-import.xqy";

It throws exception as prefix util has no namespace binding.

How to achieve this?

Upvotes: 4

Views: 1602

Answers (1)

dirkk
dirkk

Reputation: 6218

This is not possible, at least not in the way you want to do it and rightfully so. The XQuery spec doesn't allow this:

Module imports are not transitive—that is, importing a module provides access only to function and variable declarations contained directly in the imported module. For example, if module A imports module B, and module B imports module C, module A does not have access to the functions and variables declared in module C.

This is a deliberate design decision. If you want to have access in this way you could write a wrapper function for each function you want to access, e.g. in your common-import.xqy file you could have:

declare function common-import:test() { 
  util:test() 
};

But of course this can require a tremendous amount of wrapper functions. I would recommend you stick simply to inserting all required libraries. I see no benefit in doing otherwise.

Upvotes: 2

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