Is it normal that zendframework/zend-http package requires 49 components? - package

Question

Here's the composer.json:
{
"repositories": [
{
"type": "composer",
"url": "https://packages.zendframework.com/"
}
],
"require": {
"zendframework/zend-http": "2.*"
}
}
... and the exhaustive list:
Authentication Code Db Escaper Filter InputFilter Log Mime Paginator Server Stdlib Uri XmlRpc
Barcode Config Debug EventManager Form Json Mail ModuleManager Permissions ServiceManager Tag Validator
Cache Console Di Feed Http Ldap Math Mvc ProgressBar Session Test Version
Captcha Crypt Dom File I18n Loader Memory Navigation Serializer Soap Text View
Some of them actually make sense. But what about Barcode,Captcha,Navigation or even Dbfor instance?
Edit
$ rm -rf vendor
$ rm -rf ~/.composer/
$ rm composer.lock
$ more composer.json
{
"require": {
"zendframework/zend-http": "2.*"
}
}
$ composer self-update
You are using the latest composer version.
$ composer install
Loading composer repositories with package information
Installing dependencies
- Installing zendframework/zendframework (2.1.3)
Downloading: 100%
zendframework/zendframework suggests installing doctrine/common (Doctrine\Common >=2.1 for annotation features)
zendframework/zendframework suggests installing ext-intl (ext/intl for i18n features)
zendframework/zendframework suggests installing pecl-weakref (Implementation of weak references for Zend\Stdlib\CallbackHandler)
zendframework/zendframework suggests installing zendframework/zendpdf (ZendPdf for creating PDF representations of barcodes)
zendframework/zendframework suggests installing zendframework/zendservice-recaptcha (ZendService\ReCaptcha for rendering ReCaptchas in Zend\Captcha and/or Zend\Form)
Writing lock file
Generating autoload files
PS: pleased that some consider my question as simply good to be closed ... I really thank the others for having tryed to answer.

Answer 1

It doesn't.
Using that composer.json file, I get this:
$ composer.phar install
Loading composer repositories with package information
Installing dependencies
- Installing zendframework/zend-stdlib (2.1.3)
Downloading: 100%
- Installing zendframework/zend-servicemanager (2.1.3)
Downloading: 100%
- Installing zendframework/zend-filter (2.1.3)
Downloading: 100%
- Installing zendframework/zend-i18n (2.1.3)
Downloading: 100%
- Installing zendframework/zend-validator (2.1.3)
Downloading: 100%
- Installing zendframework/zend-escaper (2.1.3)
Downloading: 100%
- Installing zendframework/zend-uri (2.1.3)
Downloading: 100%
- Installing zendframework/zend-loader (2.1.3)
Downloading: 100%
- Installing zendframework/zend-http (2.1.3)
Downloading: 100%
zendframework/zend-stdlib suggests installing pecl-weakref (Implementation of weak references for Stdlib\CallbackHandler)
zendframework/zend-servicemanager suggests installing zendframework/zend-di (Zend\Di component)
zendframework/zend-filter suggests installing zendframework/zend-crypt (Zend\Crypt component)
zendframework/zend-validator suggests installing zendframework/zend-db (Zend\Db component)
zendframework/zend-validator suggests installing zendframework/zend-math (Zend\Math component)
Writing lock file
Generating autoload files
The full list of dependencies that zend-http has are:
Escaper
Filter
i18n
Loader
ServiceManager
StdLib
Uri
Validator