# Parameterized Syndication Parameterized syndication uses route and query parameters to select a source corpus and declare how a feed should filter, format, identify, attach media to, and deliver its items. AutoSites' RSS system supports editorial tiers, windows, random selection, probability gates, fresh GUIDs, current timestamps, attribution modes, length limits, image policies, hashtags, and source-specific collections. A URL becomes an executable channel recipe. Related: [[wiki/Content Syndication|Content Syndication]], [[wiki/Content Negotiation|Content Negotiation]], [[projects/AutoSites - Folder-Native Publishing and Distribution|AutoSites]].