Why company Home is referred as app:company_home in the path queries

# Spaces Configuration
spaces.store=workspace://SpacesStore
spaces.company_home.childname=app:company_home
spaces.guest_home.childname=app:guest_home
spaces.dictionary.childname=app:dictionary
spaces.templates.childname=app:space_templates
spaces.imapConfig.childname=app:imap_configs
spaces.imap_templates.childname=app:imap_templates
spaces.emailActions.childname=app:email_actions
spaces.searchAction.childname=cm:search
spaces.templates.content.childname=app:content_templates
spaces.templates.email.childname=app:email_templates
spaces.templates.email.invite1.childname=app:invite_email_templates
spaces.templates.email.notify.childname=app:notify_email_templates
spaces.templates.rss.childname=app:rss_templates
spaces.savedsearches.childname=app:saved_searches
spaces.scripts.childname=app:scripts
spaces.wcm.childname=app:wcm
spaces.wcm_content_forms.childname=app:wcm_forms
spaces.content_forms.childname=app:forms
spaces.user_homes.childname=app:user_homes
spaces.sites.childname=st:sites
spaces.templates.email.invite.childname=cm:invite
spaces.rendition.rendering_actions.childname=app:rendering_actions
spaces.wcm_deployed.childname=cm:wcm_deployed
spaces.transfers.childname=app:transfers
spaces.transfer_groups.childname=app:transfer_groups
spaces.transfer_temp.childname=app:temp
spaces.inbound_transfer_records.childname=app:inbound_transfer_records
spaces.outbound_transfer_records.childname=app:outbound_transfer_records



The above are the keys found in repository.properties.
Since companyhome is referred in property file with app:company_home and in the spring configuration files it is used.