Spin-off
A work derived from an existing story, developing a character or secondary thread, for example a separate television series. It need not be a sequel or continue the original main plot.
Definition and sourcesKNOWLEDGE / FROM A TO Z
Glossary
Technology, explained clearly. Find a term, choose a letter or narrow the topic. Definitions include sources and their review date.
Terms 73 / 685
Clear filtersSplit-horizon DNS
DNS returning different data according to query source or view. Useful internally, it complicates diagnosis and configuration consistency.
Definition and sourcesSponsored article
A publication created or placed for payment to promote something. It should be clearly labelled, and paid links appropriately qualified, for example with rel="sponsored".
Definition and sourcesSpring Boot
A Spring tool simplifying JVM application creation and execution. Auto-configuration speeds setup but production settings still need review.
Definition and sourcesSQL (Structured Query Language)
A language for defining, querying and modifying data, primarily in relational systems. Vendors implement different dialects. Queries working in one database can require changes in another.
Definition and sourcesSQL injection
Input that changes the meaning of an SQL query. Parameterised queries and appropriate permissions are key defences; stripping selected characters is insufficient.
Definition and sourcesSQL table prefix
An initial part of a table name, such as wp_ in wp_posts. It distinguishes groups of tables. Database.table or schema.table qualifies a name rather than supplying this prefix. A prefix alone does not secure a database.
Definition and sourcesSSH (Secure Shell)
Protocols for authenticated, encrypted remote connections, including command execution and tunnelling. OpenSSH is an implementation. File transfers can use SFTP or other supported mechanisms.
Definition and sourcesSSH File Transfer Protocol
A file-transfer and management protocol over SSH. It differs from FTP over TLS and requires user authentication and host verification.
Definition and sourcesSSH key
A private/public key pair used for SSH authentication. Protect the private key; verifying the server's host key is a separate check.
Definition and sourcesSSL and TLS
A historical family of secure-transport protocols superseded by TLS. SSL certificate remains colloquial terminology; obsolete SSL versions should not be enabled.
Definition and sourcesSSL/TLS
TLS protects transmission confidentiality and integrity and provides authentication. SSL is its retired predecessor, although “SSL certificate” remains a common phrase. Modern deployments should use correctly configured TLS rather than historical SSL.
Definition and sourcesStablecoin
A cryptoasset designed to track a reference value, such as the US dollar. Stability depends on reserves, mechanics and redemption arrangements. The name guarantees neither a fixed market price nor safe savings.
Definition and sourcesStaking
Committing assets to secure a proof-of-stake network under its rules, directly or through a provider. Rewards are not guaranteed. Risks include penalties, asset losses and operator dependencies.
Definition and sourcesStock media
Licensed project materials, such as photos, illustrations or music. Terms depend on the asset and licence. Royalty-free does not mean copyright-free or unrestricted; some material is licensed only for editorial use.
Definition and sourcesStructured data
Information described in a machine-readable format, such as JSON-LD using Schema.org. Valid markup enables eligible presentations but does not guarantee rich results.
Definition and sourcesStylescape
A composition presenting a brand's visual direction through elements such as colours, typography and imagery. It helps agree an aesthetic before detailed design. It is neither a complete identity system nor technical documentation.
Definition and sourcesSubdomain
A name below another in the DNS hierarchy, such as blog.example.com under example.com. It may have separate delegation or services and is not a website folder.
Definition and sourcesSubscription
Enrolment in recurring services, access or content, whether paid or free. Terms should explain charges, renewal and cancellation. Newsletter subscriptions are one example rather than the whole definition.
Definition and sourcesSupplemental index
A historical term for a supplementary Google results index. It should not diagnose every currently unindexed page; use current indexing reports.
Definition and sourcesSvelte
A component-interface tool with a significant compilation step. Complete projects also need data, routing and deployment choices, for example through SvelteKit.
Definition and sourcesSwipe-up link
A historical gesture-based way to open links in Instagram Stories. Link stickers replaced it; old tutorials may describe an obsolete interface.
Definition and sourcesSWOT analysis
Analysis of strengths, weaknesses, opportunities and threats. It structures strategic discussion but needs evidence and decisions; the table alone is no action plan.
Definition and sourcesSXO (Search Experience Optimization)
A term combining search visibility with the experience after reaching a page. It encourages attention to the whole journey. SXO is not a separate official Google algorithm or a guarantee of ranking gains through “emotions”.
Definition and sources