HTML Entity for Z Notation Bag Membership (⋿)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+22FF

HTML Entity for Z Notation Bag Membership (U+22FF) tutorial illustration

Definition

What Is Z Notation Bag Membership?

Z Notation Bag Membership (⋿) is the Unicode character at U+22FF (Z NOTATION BAG MEMBERSHIP) in Mathematical Operators. HTML5 has no named entity — use hex or decimal. Use it for multiset (bag) membership in Z notation and formal specifications.

Remember

Character     ⋿
Unicode       U+22FF
Named entity  (none)
Hex entity    &#x22FF;
Decimal       &#8959;
CSS escape    \22FF
Not the same  &isin; (∈) · &ni; (∋) · &uplus; (⊎)

Hex, decimal, CSS, and a typed character all produce the same glyph: ⋿. Prefer ⋿ or ⋿ in HTML markup. For ordinary set membership see ∈; for contains-as-member see &ni;.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	None	Use numeric or type the character
Hex entity	`⋿`	HTML markup (preferred)
Decimal entity	`⋿`	HTML markup
CSS escape	`\22FF`	Stylesheet `content` (4 hex digits)
Direct character	`⋿`	UTF-8 HTML text

When to Use Which

Situation	Use
Z notation bag / multiset membership	`⋿` or type `⋿`
Numeric-only markup	`⋿` or `⋿`
Generated text via `::before` / `::after`	`content: "\22FF"`
Ordinary set membership (∈)	Use `∈` (U+2208)
Contains as member (∋)	Use `&ni;` (U+220B)

See it

Live Preview

⋿ in a short formula and beside related operators.

Example x ⋿ B

Large glyph ⋿

Hex entity ⋿ → ⋿

vs look-alikes ⋿ | ∈ | ∋ | ⊎

With entities Hex: ⋿ | Decimal: ⋿

Code

Complete HTML Example

One page that shows Z Notation Bag Membership with hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.

Hex + Decimal + CSS + Typed

Four ways to display ⋿ in HTML and CSS. No named entity exists.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Z Notation Bag Membership (⋿)</title>
  <style>
    #point::after {
      content: "\22FF";
    }
  </style>
</head>
<body>
  <p>Built with Hex: &#x22FF;</p>
  <p>Built with Decimal: &#8959;</p>
  <p id="point">Built with CSS: </p>
  <p>Typed: ⋿</p>
  <p>Formula: x &#x22FF; B</p>
</body>
</html>

Try It Yourself

How It Works

1. Hex / decimal: U+22FF → ⋿ or ⋿. The browser turns either into ⋿.

2. Typed: in a UTF-8 document you can paste ⋿ directly — same glyph, no entity.

3. CSS: use \22FF in content (four hex digits; not an HTML entity). #point::after appends that ⋿ after the paragraph text.

4. Look-alikes: ∈ is ∈; &ni; is ∋ — different operators for ordinary set membership.

Pitfalls & Tips

Common mistakes when working with Z Notation Bag Membership.

Named

There is no named entity

HTML5 does not define a name for U+22FF. Use ⋿ or ⋿.

vs ∈

Not ordinary set membership

∈ is ∈ (U+2208). See Element Of. Use U+22FF only for bag membership.

vs ∋

Not contains-as-member

&ni; is ∋ (U+220B). See Contains As Member.

Fonts

Need math glyph coverage

Some fonts omit U+22FF. Prefer fonts that cover Mathematical Operators (U+2200–U+22FF).

CSS vs HTML

Do not mix escapes

\22FF belongs in CSS strings. ⋿ / ⋿ belong in HTML.

Encoding

Declare UTF-8

If you type ⋿ directly, keep <meta charset="UTF-8"> so the file is not misread.

Compatibility

Browser Support

Z Notation Bag Membership (U+22FF) and its entity forms (⋿, ⋿, CSS \\22FF) are supported in all mainstream browsers when the page is UTF-8 and the font covers Mathematical Operators.

✓ Universal support

Z Notation Bag Membership (⋿)

Encode with hex, decimal, CSS escape, or type the character — same Unicode code point everywhere. No named entity.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer IE 9+

Yes*

U+22FF Full support

Bottom line: Prefer ⋿ in HTML text. Use ⋿ as an equivalent, and \\22FF only inside CSS content. Glyph display depends on font coverage.

Remember

Key Takeaways

Unicode: this operator is U+22FF (decimal 8959) — glyph ⋿.
HTML: prefer ⋿ — also ⋿. No named entity.
CSS: use \22FF inside content for generated text.
Watch out: ⋿ ≠ ∈ ≠ ∋.

One line: U+22FF → ⋿ / ⋿ / CSS \22FF (no named entity).

Frequently Asked Questions

How do I display Z Notation Bag Membership (⋿) in HTML using entities?

Use ⋿ (hex), ⋿ (decimal), type ⋿ directly in UTF-8, or the CSS escape \22FF in the content property. There is no named HTML entity. Prefer ⋿ for readable markup.

What is the Unicode value for Z Notation Bag Membership?

U+22FF (Z NOTATION BAG MEMBERSHIP). Hex 22FF, decimal 8959. It belongs to the Mathematical Operators block (U+2200–U+22FF).

Is there a named HTML entity for U+22FF?

No. HTML5 does not define a named form. Use numeric references ⋿ or ⋿, or type ⋿ in UTF-8.

How is U+22FF different from U+2208 (∈)?

U+22FF is bag (multiset) membership in Z notation (⋿). U+2208 (∈) is ordinary set membership (∈). Use the bag symbol only when you mean multiset membership.

When should I use this HTML entity?

Use it in Z notation, formal specifications, and multiset documentation. Prefer ∈ for ordinary set membership.

What is the difference between HTML code and CSS entity for U+22FF?

HTML entities (⋿ or ⋿) go in markup. The CSS escape \22FF is used in stylesheets (usually in the content property of ::before/::after). Prefer four hex digits in CSS.

Did you know?

Z Notation Bag Membership is Unicode U+22FF (decimal 8959) — glyph ⋿ (Z NOTATION BAG MEMBERSHIP) in Mathematical Operators. HTML5 has no named entity — use ⋿ or ⋿. Do not confuse it with set membership ∈ (∈) or contains-as-member &ni; (∋).

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Mari Selvan M P 🔗

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