RNX code library · 9 controls
RNX-180Multimodal Synchronization
Read what these checks mean, why they matter and which evidence they concern. Each ID below keeps its canonical place in the RNX hierarchy.
These are free learning summaries, not full technical tests or an industry certification. Specialized checks apply only to the relevant feature. Experimental labels are preserved from the canonical source.
RNX-181 · Descriptive Multimodal Tagging
RNX-181.T001
Informative image alternative
core readiness
Give informative images useful text alternatives.
Why it matters. People who cannot see the image still need its information or function.
Illustration — fictional. An image shows a blue backpack while its text alternative calls it a red shoe.
When it applies. Inspected target: image. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T002
Decorative image treatment
core readiness
Keep decorative images from adding meaningless spoken text.
Why it matters. This makes the page less noisy for screen-reader users.
Illustration — fictional. A screen reader announces a meaningless filename for every decorative divider.
When it applies. Inspected target: image. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T003
Image retrieval
core readiness
Make intended public images reachable through supported addresses.
Why it matters. A useful image cannot be discovered through a broken source.
Illustration — fictional. The product image's address returns a missing-file error.
When it applies. Inspected target: image resource. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T004
Caption factual accuracy
core readiness
Keep captions and image credits accurate.
Why it matters. The picture's subject and owner should not be misidentified.
Illustration — fictional. Stock image presented as completed client work.
When it applies. Inspected target: caption. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T005
Prerecorded captions
core readiness
Provide accurate captions for necessary prerecorded sound.
Why it matters. People watching without hearing should receive the important information.
Illustration — fictional. Caption omits safety instruction.
When it applies. Inspected target: caption track. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T006
Audio-only transcript
core readiness
Provide a text equivalent for audio-only material.
Why it matters. An interview or recording should not be the only way to get its useful facts.
Illustration — fictional. Transcript omits eligibility limitation.
When it applies. Inspected target: transcript. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T007
Visual-information alternative
core readiness
Describe essential visual information that prerecorded video audio does not explain.
Why it matters. Otherwise a listener may miss the action that carries the meaning.
Illustration — fictional. A video silently demonstrates an essential safety step without describing it in the audio.
When it applies. Inspected target: audio description. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-181.T008
Image sitemap record validity
core readiness
For image sitemaps, connect real retrievable images to their pages.
Why it matters. A list of nonexistent images does not improve discovery.
Illustration — fictional. An image sitemap points to a missing picture or a picture of the wrong product.
When it applies. Inspected target: image sitemap entry. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.
RNX-182 · Visual Semantic Consistency
RNX-182.T001
Media factual consistency
Experimental — not an established ranking requirement
Make images and other media represent the actual offer.
Why it matters. A photograph should not imply a false location or credential.
Illustration — fictional. Old storefront depicted as current branch.
When it applies. Inspected target: media claim. Use this check only when that object or feature exists in the review scope; provider-specific checks require that provider's integration. Missing evidence remains unknown.