# References

- [IndustryApps - Intro](/common-faq/master.md): IndustryApps - World's first marketplace for Industry 4.0 solutions. Expose your products to a global customer base.
- [What is an Asset Administration Shell?](/common-faq/what-is-an-asset-administration-shell.md): The Digital twin standard for Industry 4.0
- [What is ECLASS?](/common-faq/how-to-use-eclass-and-concept-dictionary.md): .Semantic standard recommended as Industry 4.0 standard
- [How is ECLASS and Concept dictionary are used](/common-faq/how-to-use-eclass-and-concept-dictionary/how-is-eclass-and-concept-dictionary-are-used.md): Ensuring Semantic interoperability
- [Industry 4.0 standards](/common-faq/industry-4.0-standards.md): Standards proposed by Platform Industrie 4.0
- [Customer Terms of Use](/common-faq/customer-terms-of-use.md): Terms of use to be accepted by customer for using the platform
- [Subscription Order](/common-faq/customer-terms-of-use/subscription-order.md): Customer subscription order
- [Solution provider Terms of Use](/common-faq/solution-provider-terms-of-use.md): Terms and conditions
- [Contract regions](/common-faq/solution-provider-terms-of-use/contract-regions.md): Regional scope
- [Submission Form ( Solution provider)](/common-faq/solution-provider-terms-of-use/submission-form-solution-provider.md): Submission form - Template